Electric fields steered nanoparticles through a liquid-filled maze – this new method could improve drug delivery and purification systems

Source: The Conversation – USA – By Daniel K. Schwartz, Professor of Chemical and Biological Engineering, University of Colorado Boulder

Nanoparticles move through materials like tiny cars through a maze. OsakaWayne Studios/Moment via Getty Images

In the home, the lab and the factory, electric fields control technologies such as Kindle displays, medical diagnostic tests and devices that purify cancer drugs. In an electric field, anything with an electrical charge – from an individual atom to a large particle – experiences a force that can be used to push it in a desired direction.

When an electric field pushes charged particles in a fluid, the process is called electrophoresis. Our research team is investigating how to harness electrophoresis to move tiny particles – called nanoparticles – in porous, spongy materials. Many emerging technologies, including those used in DNA analysis and medical diagnostics, use these porous materials.

Figuring out how to control the tiny charged particles as they travel through these environments can make them faster and more efficient in existing technologies. It can also enable entirely new smart functions.

Ultimately, scientists are aiming to make particles like these serve as tiny nanorobots. These could perform complex tasks in our bodies or our surroundings. They could search for tumors and deliver treatments or seek out sources of toxic chemicals in the soil and convert them to benign compounds.

To make these advances, we need to understand how charged nanoparticles travel through porous, spongy materials under the influence of an electric field. In a new study, published Nov. 10, 2025, in the Proceedings of the National Academy of Sciences, our team of engineering researchers led by Anni Shi and Siamak Mirfendereski sought to do just that.

Weak and strong electric fields

Imagine a nanoparticle as a tiny submarine navigating a complex, interconnected, liquid-filled maze while simultaneously experiencing random jiggling motion. While watching nanoparticles move through a porous material, we observed a surprising behavior related to the strength of the applied electric field.

A weak electric field acts only as an accelerator, boosting the particle’s speed and dramatically improving its chance of finding any exit from a cavity, but offering no directional guidance – it’s fast, but random.

In contrast, a strong electric field provides the necessary “GPS coordinates,” forcing the particle to move rapidly in a specific, predictable direction across the network.

This discovery was puzzling but exciting, because it suggested that we could control the nanoparticles’ motion. We could choose to have them move fast and randomly with a weak field or directionally with a strong field.

The former allows them to search the environment efficiently while the latter is ideal for delivering cargo. This puzzling behavior prompted us to look more closely at what the weak field was doing to the surrounding fluid.

A diagram showing tiny particles in a porous material. On the left they are searching without direction – by moving from cavity to cavity randomly, labeled 'weak field' – and on the right they are drifting in a particular direction – by escaping from each cavity toward the neighboring cavity dictated by the electric field, labeled 'strong field'
This diagram shows how a particle moves through a porous material over time in a weak or strong electric field. The darkest color indicates the starting point of the particle, and successively lighter colors represent the particle’s position after more time has passed. The particle in a weak field moves randomly, while the particle in a strong field gradually moves in the direction determined by the electric field.
Anni Shi

By studying the phenomenon more closely, we discovered the reasons for these behaviors. A weak field causes the stagnant liquid to flow in random swirling motions within the material’s tiny cavities. This random flow enhances a particle’s natural jiggling and pushes it toward the cavity walls. By moving along walls, the particle drastically increases its probability of finding a random escape route, compared to searching throughout the entire cavity space.

A strong field, however, provides a powerful directional push to the particle. That push overcomes the natural jiggling of the particle as well as the random flow of the surrounding liquid. It ensures that the particle migrates predictably along the direction of the electric field. This insight opens the door for new, efficient strategies to move, sort and separate particles.

Tracking nanoparticles

To conduct this research, we integrated laboratory observation with computational modeling. Experimentally, we used an advanced microscope to meticulously track how individual nanoparticles moved inside a perfectly structured porous material called a silica inverse opal.

A zoomed in microscope image of a porous material, which is made up of small circles, each with three small cavities, arranged in a grid pattern.
A scanning electron micrograph of a silica inverse opal, showing a cross section of the engineered porous material with cavities, 500 nanometers in diameter, set in small holes, 90 nanometers in diameter.
Anni Shi

We then used computer simulations to model the underlying physics. We modeled the particle’s random jiggling motion, the electrical driving force and the fluid flow near the walls.

By combining this precise visualization with theoretical modeling, we deconstructed the overall behavior of the nanoparticles. We could quantify the effect of each individual physical process, from the jiggling to the electrical push.

A large, see-through box connected to machinery.
This high-resolution fluorescence microscope, in the advanced light microscopy core facility at the University of Colorado Boulder, obtained three-dimensional tracks of nanoparticles moving within porous materials.
Joseph Dragavon

Devices that move particles

This research could have major implications for technologies requiring precise microscopic transport. In these, the goal is fast, accurate and differential particle movement. Examples include drug delivery, which requires guiding “nanocargo” to specific tissue targets, or industrial separation, which entails purifying chemicals and filtering contaminants.

Our discovery – the ability to separately control a particle’s speed using weak fields and its direction using strong fields – acts as a two-lever control tool.

This control may allow engineers to design devices that apply weak or strong fields to move different particle types in tailored ways. Ultimately, this tool could improve faster and more efficient diagnostic tools and purification systems.

What’s next

We’ve established independent control over the particles’ searching using speed and their migration using direction. But we still don’t know the phenomenon’s full limits.

Key questions remain: What are the upper and lower sizes of particles that can be controlled in this way? Can this method be reliably applied in complex, dynamic biological environments?

Most fundamentally, we’ll need to investigate the exact mechanism behind the dramatic speedup of these particles under a weak electric field. Answering these questions is essential to unlocking the full precision of this particle control method.

Our work is part of a larger scientific push to understand how confinement and boundaries influence the motion of nanoscale objects. As technology shrinks, understanding how these particles interact with nearby surfaces will help design efficient, tiny devices. And when moving through spongy, porous materials, nanoparticles are constantly encountering surfaces and boundaries.

The collective goal of our and others’ related research is to transform the control of tiny particles from a process of trial and error into a reliable, predictable science.

The Conversation

Daniel K. Schwartz receives funding from the US Department of Energy, the National Science Foundation, and the National Institutes of Health.

Ankur Gupta receives funding from the National Science Foundation and the Air Force Office of Scientific Research.

ref. Electric fields steered nanoparticles through a liquid-filled maze – this new method could improve drug delivery and purification systems – https://theconversation.com/electric-fields-steered-nanoparticles-through-a-liquid-filled-maze-this-new-method-could-improve-drug-delivery-and-purification-systems-268553

Blame the shutdown on citizens who prefer politicians to vanquish their opponents rather than to work for the common good

Source: The Conversation – USA – By Robert B. Talisse, W. Alton Jones Professor of Philosophy, Vanderbilt University

Who is really responsible for the longest government shutdown in history? iStock/Getty Images Plus

The United States was founded on the idea that government exists to serve its people. To do this, government must deliver services that promote the common good. When the government shuts down, it fails to meet its fundamental purpose.

While government shutdowns are not new in the U.S., most have lasted less than a week. At 40 days, the current shutdown may well be on the way to an end this week, as enough Senate Democratic caucus members have voted with Republicans on a measure to reopen the government. But it will remain the longest in the history of the nation.

When the government shuts down for such a long time, it inflicts hardships, anxieties and irritations on its citizens. You might wonder why elected officials allow lengthy disruptions to happen.

It is common to blame the politicians for the shutdown. However, as a philosopher who researches democracy, I think the fault lies also with us, the citizens. In a democracy, we generally get the politics we ask for, and the electorate has developed a taste for political spectacle over competent leadership.

American democracy has grown increasingly tribal, leading us to become more invested in punishing our partisan rivals than in demanding competent government. We are infatuated with the spectacle of our side dominating the other.

Understandably, politicians have embraced obstruction. They have learned that deadlock can pay, because they have the support of their voters in behaving this way. Politics is no longer about representation and policy, it’s now about vanquishing and even humiliating the other side.

Three women and two men on a stage with American flags flanking them, and one of them speaking at a lectern.
U.S. Sen. Maggie Hassan speaks at a press conference with other Senate Democratic caucus members who voted to restore government funding, in Washington, D.C., on Nov. 9, 2025.
Nathan Posner/Anadolu via Getty Images

More fervent, not better informed

To see this, we must examine polarization. Let’s start by distinguishing two kinds of polarization.

First is political polarization. It measures the divide between the U.S.’s two major parties. When political polarization is severe, the common ground among the parties falls away. This naturally undermines cooperation. That Republicans and Democrats are politically polarized is certainly part of the explanation for the shutdown.

But that’s not the entire story. As I argue in my book “Civic Solitude,” the deeper trouble has to do with belief polarization.

Unlike political polarization, which measures the distance between opposing groups, belief polarization occurs within a single group. In belief polarization, like-minded people transform into more extreme version of themselves: Liberals become more liberal, conservatives become more conservative, Second Amendment advocates become more pro-gun, environmentalists become more green, and so on.

Importantly, this shift is driven by the desire to fit in with one’s peers, not by evidence or reason. Hence, we become more fervent but no better informed.

Additionally, our more extreme selves are also more tribal and conformist. As we shift, we become more antagonistic toward outsiders. We also become more insistent on uniformity within our group, less tolerant of differences.

Animosity and obstruction

The combination of intensifying antagonism toward those on the “other side” and escalating cohesion among those on “your side” turns all aspects of life into politics.

In the U.S. today, liberals and conservatives are heavily socially segregated. They live in different neighborhoods, work in different professions, vacation in different locations, drive different vehicles and shop in different stores. Everyday behavior has become an extension of partisan affiliation.

Ironically, as everyday life becomes politically saturated, politics itself becomes more about lifestyle and less about policy. Research suggests that while animosity across the parties has intensified significantly, citizens’ disagreements over policy have either remained stable or eased. We dislike one another more intensely yet are not more divided.

This paints a grim portrait of U.S. democracy. Note that this condition incentivizes politicians to amplify their contempt for political rivals. Politicians seek to win elections, and stoking negative feelings such as fear and indignation are potent triggers of political behavior, including voting.

Consequently, when citizens are belief polarized, animosity and obstruction become winning electoral strategies. Meanwhile, politicians are released from the task of serving the common good.

A group of people standing behind a man who's standing at a lectern, behind a sign that says 'The DEMOCRAT SHUTDOWN.'
U.S. Speaker of the House Mike Johnson speaks during a news conference with House Republican leadership at the U.S. Capitol on Nov. 6, 2025.
Saul Loeb/AFP via Getty Images

Channeling contempt

It is no surprise that discussions of the shutdown have consistently focused on blame.

The Republicans, who hold the congressional majority, have sought to score points by depicting the shutdown as the Democrats’ fault. Several official websites maintained by the federal government included statements denouncing the shutdown as strictly the doing of the Democrats. Their aim has been to channel citizens’ frustration into contempt for the Democratic Party.

At the beginning of the shutdown, House Speaker Mike Johnson claimed that there was “literally nothing to negotiate” with congressional Democrats.

But there’s the rub. Democratic government is fundamentally a matter of negotiation. Neither winning an election nor being a member of the majority party means that you can simply call the shots. The constitutional procedures by which our representatives govern are designed to force cooperation, collaboration and compromise.

Thanks to polarization, however, these noble ideals of political give-and-take have dissolved. Cooperation is now seen as surrender to political enemies. That’s very clear in many Democrats’ outraged reactions to the eight senators from their caucus who have now voted with Republicans to end the shutdown.

Meanwhile, more than 1 million government employees haven’t been paid, many crucial government services have been interrupted, diminished or suspended, and, with the Thanksgiving holiday approaching, travelers are experiencing flight disruptions. While there may be an end to the shutdown on the near horizon, any deal could simply postpone crucial policy debates and could well end in another shutdown in the new year.

The key to avoiding this kind of failure is to become a citizenry that demands competent government over partisan domination.

The Conversation

Robert B. Talisse does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Blame the shutdown on citizens who prefer politicians to vanquish their opponents rather than to work for the common good – https://theconversation.com/blame-the-shutdown-on-citizens-who-prefer-politicians-to-vanquish-their-opponents-rather-than-to-work-for-the-common-good-269041

A bold new investment fund aims to channel billions into tropical forest protection – one key change can make it better

Source: The Conversation – USA (2) – By Jason Gray, Environmental Attorney, Emmett Institute on Climate Change and the Environment, University of California, Los Angeles

Cattle, the No. 1 cause of tropical deforestation, roam on tropical forest land that was stripped bare in Acre, Brazil. AP Photo/Eraldo Peres

The world is losing vast swaths of forests to agriculture, logging, mining and fires every year — more than 20 million acres in 2024 alone, roughly the size of South Carolina.

That’s bad news because tropical forests in particular regulate rainfall, shelter plant and animal species and act as a thermostat for the planet by storing carbon, keeping it out of the atmosphere where it would heat up the planet. The United Nations estimates that deforestation and forest degradation globally contribute about 11% of total greenhouse gas emissions.

Over the years, countries have committed to reverse that forest loss, and many organizations, governments, and Indigenous and local communities have worked hard to advance those goals. Many of their efforts have been at least partly successful.

For instance, Brazil credits stronger law enforcement and better monitoring at the state and national levels for helping reduce illegal land clearing and deforestation in the Amazon. The deforestation rate there fell by 31% from 2023 to 2024.

A ranger puts a red line on a tree to mark it. Villagers stand near by with evidence of cut down trees around them.
A forest ranger in Indonesia marks a tree to encourage protecting it in an area where villagers have cleared forest for a coffee plantation.
AP Photo/Dita Alangkara

Funding from governments and the private sector is helping communities restore land that has already been cleared. Often this involves planting native tree species that bring additional economic value to communities by providing fruits and nuts.

Other programs protect forests through payments for ecosystem services, such as paying landowners to maintain existing forests and the benefits those forests provide. These programs provide money to a government, community or landowner based on verified results that the forest is being protected over time.

And yet, despite these and many other efforts, the world is falling short on its commitments to protect tropical forests. The planet lost 6.7 million hectares of tropical forest, nearly 26,000 square miles (67,000 square kilometers), in 2024 alone.

Law enforcement is not enough by itself. When enforcement is weakened, as happened in Brazil from 2019 to 2023, illegal land clearing and forest loss ramp back up. Programs that pay landowners to keep forests standing also have drawbacks. Research has shown they might only temporarily reduce deforestation if they don’t continue payments long term.

The problem is that deforestation is often driven by economic factors such as global demand for crops, cattle and minerals such as gold and copper. This demand provides significant incentives to farmers, companies and governments to continue clearing forests.

The amount of money committed to protecting forests globally is about US$5.7 billion per year – a fraction of the tens of billions of dollars banks and investors put into the companies that drive deforestation.

Simply put, the scale of the deforestation problem is massive, and new efforts are needed to truly reverse the economic drivers or causes of deforestation.

In order to increase the amount of funding to protect tropical forests, Brazil launched a global program on Nov. 6, 2025, ahead of the annual U.N. climate conference, called the Tropical Forest Forever Facility, or TFFF. It is an innovative approach that combines money from countries and private investors to compensate countries for preserving tropical forests.

As an environmental law scholar who works in climate policy development, including to protect tropical forests, I believe this program has real promise. But I also see room to improve it by bringing in states and provinces to ensure money reaches programs closer to the ground that will pay off for the environment.

What makes the Tropical Forest Forever Facility different?

The Tropical Forest Forever Facility seeks to tackle the deforestation problem by focusing on the issue of scale – both geographic and economic.

First, it will measure results across entire countries rather than at the smaller landowner level. That can help reduce deforestation more broadly within countries and influence national policies that currently contribute to deforestation.

Second, it seeks to raise billions of dollars. This is important to counter the economic incentives for clearing forests for agriculture, livestock and timber.

The mechanics of raising these funds is intriguing – Brazil is seeking an initial $25 billion from national governments and foundations, and then another $100 billion from investors. These funds would be invested in securities – think the stock and bond markets – and returns on those investments, after a percentage is paid to investors, would be paid to countries that demonstrate successful forest protection.

These countries would be expected to invest their results-based payments into forest conservation initiatives, in particular to support communities doing the protection work on the ground, including ensuring that at least 20% directly supports local communities and Indigenous peoples whose territories often have the lowest rates of deforestation thanks to their efforts.

Most of the loss to commodities is in South America and Southeast Asia.
Where different types of deforestation are most prominent. Shifting agriculture, shown in yellow, reflects land temporarily cleared for agriculture and later allowed to regrow.
Project Drawdown, data from Curtis et al., 2018, CC BY-ND

Finally, the Tropical Forest Forever Facility recognizes that, like past efforts, it is not a silver bullet. It is being designed to complement other programs and policies, including carbon market approaches that raise money for forest protection by selling carbon credits to governments and companies that need to lower their emissions.

What has been the reaction so far?

The new forest investment fund is attracting interest because of its size, ambition and design.

Brazil and Indonesia were the first to contribute, committing $1 billion each. Norway added $3 billion on Nov. 7, and several other countries also committed to support it.

The Tropical Forest Forever Facility still has a long way to go toward its $125 billion goal, but it will likely draw additional commitments during the U.N. climate conference, COP30, being held Nov. 10-21, 2025, in Brazil. World leaders and negotiators are meeting in the Amazon for the first time.

An aerial view of the Caquetá region, with a river winding through forest and areas of deforested land.
In Caquetá, Colombia, a mix of training for farmers, expanding their ability to sell the fruit they grow, and a local government program that pays landowners relatively small amounts to restore forests helped reduce local deforestation by 67% from 2021 to 2023.
Guillermo Legaria/AFP via Getty Images

How can the Tropical Forest Forever Facility be improved?

The Tropical Forest Forever Facility’s design has drawn some criticism, both for how the money is raised and for routing the money through national governments. While the fund’s design could draw more investors, if its investments don’t have strong returns in a given year, the fund might not receive any money, likely leaving a gap in expected payments for the programs and communities protecting forests.

Many existing international funding programs also provide money solely to national governments, as the Amazon Fund and the U.N.’s Global Environment Facility do. However, a lot of the actual work to reduce deforestation, from policy innovation to implementation and enforcement, takes place at the state and provincial levels.

One way to improve the Tropical Forest Forever Facility’s implementation would be to include state- and provincial-level governments in decisions about how payments will be used and ensure those funds make it to the people taking action in their territories.

The Governors’ Climate and Forests Task Force, a group of 45 states and provinces from 11 countries, has been giving feedback on how to incorporate that recommendation.

The task force developed a Blueprint for a New Forest Economy, which can help connect efforts such as the Tropical Forest Forever Facility to state- and community-level forest protection initiatives so funding reaches projects that can pay off for forest protection.

The Tropical Forest Forever Facility is an example of the type of innovative mechanism that could accelerate action globally. But to truly succeed, it will need to be coordinated with state and provincial governments, communities and others doing the work on the ground. The world’s forests – and people – depend on it.

The Conversation

Jason Gray is the Project Director of the Governors’ Climate and Forests Task Force, a project of the Emmett Institute on Climate Change and the Environment at UCLA School of Law. The GCF Task Force receives funding support from the Norwegian Agency for Development Cooperation.

ref. A bold new investment fund aims to channel billions into tropical forest protection – one key change can make it better – https://theconversation.com/a-bold-new-investment-fund-aims-to-channel-billions-into-tropical-forest-protection-one-key-change-can-make-it-better-269374

Sex work on trial: What the recently dismissed constitutional challenge means

Source: The Conversation – Canada – By Treena Orchard, Associate Professor, School of Health Studies, Western University

Most Canadians have access to workplaces that are safe, promote health and autonomy and, most importantly, are protected by the law. But for people in criminalized professions, including sex work, it’s a different story.

In Canada, sex work itself is legal. But most aspects associated with doing sex work — purchasing sexual services and communicating for that purpose — are illegal.

R. v. Kloubakov, a recent Supreme Court of Canada case, demonstrates how basic elements of the workplace for sex workers are not only contested under the law, but they’re also being decided upon without the input of people in the profession.

This ruling upholds the constitutionality of Canada’s sex work legislation, which many sex workers advocated against in 2014 when the laws were changed to include the criminalization of clients. This legislative shift negatively impacts sex workers because it creates a climate of anxiety among clients, who can become more aggressive with workers because they fear being “outed” or arrested by police.

For more than two decades, I have had the privilege of learning about these issues directly from women, men and transgender people in India and several Canadian cities, including Vancouver, London and Kitchener-Waterloo, who do this work.

Alongside their intelligence, wit and deep insights into human nature, the sex workers I’ve known cultivate profoundly meaningful communities and care for one another in exemplary ways.

The ‘legal-but-illegal’ paradox

When it comes to sex work, there are three primary approaches to legislation, beginning with the abolitionist framework, sometimes called the Sex Buyer Law or the Swedish or Nordic model. This system decriminalizes people who sell sex, provides supports to help workers exit sex work and makes the purchase of sex a criminal offence.

Canada adopted this framework in 2014 as part of Bill C-36, the Protection of Communities and Exploited Persons Act.

Next is legalization, a legislative model in which governments introduce specific laws and regulations allowing certain forms of sex work to take place under controlled conditions. Authorities can impose a very controlled framework governing numerous aspects of the sex industry, including forced HIV/STI testing, restrictions on advertising and strict workplace-licensing rules.

Examples of this legislative approach are seen in countries like the Netherlands, Germany and Greece.

The third approach is decriminalization, which removes all laws and regulations that criminalize or penalize sex work, including its sale, purchase, advertisement and involvement of third parties such as managers and brothel keepers. This framework allows sex workers to retain agency and control over their work.

New Zealand and Belgium are examples of countries that have decriminalized sex work.

Over the past decade, Canada’s sex work laws, however, have grown increasingly punitive, even though the number of arrests has decreased. Canadian sociologist Chris Smith found sex work–related arrests peaked at nearly 2,800 in 1992 and fell to just 11 by 2020.

And, as Smith argues, there is a mismatch between legislation and the actual crime, which significantly affects sex workers’ conditions and safety.

Inside the R. v. Kloubakov decision

In a unanimous decision on July 24, 2025, the Supreme Court of Canada dismissed the constitutional challenge by Mikhail Kloubakov and Hicham Moustaine against Canada’s sex work laws. At issue were two parts of Canada’s sex-work criminalization legislation: receiving material benefits from sex workers and the procuring of sexual services.

The men, who were drivers for an escort agency in Calgary and were also responsible for transferring money earned by sex workers to the agency operators, pleaded guilty of separate charges related to human trafficking.

The trial judge had found them guilty of violating the Criminal Code by profiting from sex workers. She stayed proceedings on whether current sex work laws impacted the safety of sex workers.

The case challenged the constitutionality of the sex work laws, but ignored the difficulties of working in a criminalized profession subject to intense police surveillance stemming from receiving material benefits and procuring offences.

These offences make sex workers vulnerable to a range of harms, including institutional abuse, targeted violence, xenophobic raids leading to deportations and closures of safe indoor workspaces, constant threats of surveillance, and unwanted contact with law enforcement.

Research shows that in some Canadian cities, fears associated with police surveillance (such as being outed as a sex worker and racially profiled) are so prevalent that sex workers hesitate to contact police after facing violent armed robberies.

The court overlooks dignity

In R. v. Kloubakov, the Supreme Court of Canada did not prioritize the safety and security objective in its analysis. Instead, it treated it as just another issue among others. The court also failed to engage meaningfully with evidence relating to the lived experiences of sex workers. Decisions about sex workers’ rights under the Charter of Rights and Freedoms should not be made without sex workers at the table.

Criminalizing sex work is not a benign act with abstract consequences.

It isolates sex workers from society and resources, and positions them as targets for violence, discrimination and labour exploitation. It also contravenes regulatory approaches from the United Nations Human Rights Council, which views the criminalization of sex workers as a form of gender-based discrimination and advocates for a human-rights framework that aligns with decriminalization.

In a country that claims to care about all of its citizens, it’s imperative that we stand with those among us who are forced to struggle for basic human rights in their chosen profession — whether taking up that profession is dictated by pleasure, empowerment or survival.

What to expect going forward

This debate is far from over. Some of the issues the court declined to rule on will be raised in the Canadian Alliance for Sex Work Law Reform v. Canada case that is currently pending before the Ontario Court of Appeal after being struck down in 2021 by the Ontario Supreme Court.

This case challenges several sex work prohibitions on the grounds that they violate sex workers’ rights to freedom of expression, life, liberty, security of the person and equality, all of which are protected by the Canadian Charter.

While the case is on hold, Canadians can enhance what they know about sex work from organizations who advocate for sex worker rights, sex workers who write about their experiences and a host of other cultural spaces.

The Conversation

Treena Orchard has received funding from CIHR, SSHRC, and Western University, but no research funds were used in the creation of this article.

ref. Sex work on trial: What the recently dismissed constitutional challenge means – https://theconversation.com/sex-work-on-trial-what-the-recently-dismissed-constitutional-challenge-means-267163

Governments can protect marine environments by supporting small-scale fishing

Source: The Conversation – Canada – By Rashid Sumaila, Director & Professor, Fisheries Economics Research Unit, University of British Columbia

The world’s oceans are vital for life on Earth. Drifting phytoplankton provide almost half the oxygen released into the atmosphere. Marine and coastal ecosystems provide food and protect communities from storms.

Nearly 30 per cent of the world’s population lives in coastal areas. However, rapidly changing climate and massive biodiversity losses represent an unprecedented threat to these ecosystems and to life on Earth as we know it. Research shows that coastal regions bear the brunt of climate change and extractive impacts.

Industrial fishing can extract in a day what a small boat might take in a year. Since 1950, carbon dioxide emissions from global marine fisheries have quadrupled. Bottom trawling — where a ship tows a large net along the seafloor — adds further damage by disturbing carbon-rich seafloor sediments.

Scientists estimate that between 1996 and 2020, 9.2 billion tons of carbon dioxide were released into the atmosphere due to bottom trawling — about 370 million tons annually, double the emissions from fuel combustion of the entire global fishing fleet of four million vessels.

By the middle of this century, 12 per cent of nearshore ocean areas could be transformed beyond recognition. In the tropics — Earth’s life ring — human-driven impacts are expected to triple by 2041-60. Our planet’s oceans are facing a critical risk, and we must act urgently to protect them in ways that also benefit the people who rely on them.

As COP30 gets underway in Belem, Brazil, developing measures to protect the world’s oceans and fisheries must be on the agenda.

The key lies in empowering those who have long stewarded these ecosystems: Indigenous and coastal communities. Their traditional fishing practices, passed down through generations, offer a model for balancing ecological recovery with human well-being. Governments must listen to and learn from them.

The industrial threat

To include climate-regulating habitats in global conservation goals, governments must develop policy solutions that prioritize small-scale fishers and Indigenous and coastal communities and mitigate the destructive impacts of industrial fishing fleets.

One in every 12 people globally — nearly half of them women — depend at least partly on small-scale fishing for their livelihood. In contrast to destructive industrial fleets, small-scale fisheries are among the most energy-efficient, animal-sourced food production systems, with low environmental impacts in terms of greenhouse gas and other stressors and outsized economic and social value.

An important measure that could both support small-scale fisheries and contribute to countries’ contributions under global frameworks such as the United Nations Sustainable Development Goals is the formal exclusion of destructive industrial fishing from nearshore waters.

Inshore exclusion zones (IEZs) — also called preferential access areas — are coastal areas that prohibit certain methods of industrial fishing and grant preferential access to small-scale fishers.

When paired with co-management between governments and communities, IEZs can help restore fish populations and strengthen food security and livelihoods.

A promising example is in Ghana, where a bill has just been signed by the president to extend IEZs from six to 12 nautical miles, protecting more coastal waters for small-scale fishers.

An inclusive solution

To support these essential producers while meeting climate and biodiversity goals, governments must apply existing policies in ways that centre people.

The UN’s Global Biodiversity Framework, adopted in 2022, recognizes Indigenous Peoples and local communities as custodians of biodiversity. It also commits governments to protect at least 30 per cent of land and sea by 2030.

But governments must avoid the trap of “paper protection” — designating areas as protected without real enforcement or community involvement. Instead, we need practical, inclusive approaches that uphold both conservation and equity.

Locally led protection

I’m an adviser to Blue Ventures, a non-governmental organization working with coastal communities to restore their seas and build lasting prosperity. The organization helped pioneer the Locally Managed Marine Area (LMMA) model, which blends traditional knowledge and spiritual belief with modern conservation science.

LMMAs protect coral, mangrove and seagrass habitats, increase participation in biodiversity stewardship, enhance food security and build climate resilience.

Supporting coastal communities to establish functional and legal LMMAs — while excluding carbon-intensive industrial fishing from these areas — and recognizing and embedding the approach into global biodiversity frameworks and targets would mark an important shift in valuing conservation outcomes in areas where humans and marine life coexist.

If inclusive marine protection methods, like LMMAs and similar areas under traditional governance, were recognized as key tools to protect biodiversity, we could see a welcome alliance of formally protected areas and those under local governance, all contributing to global conservation targets.

Ultimately, governments should aim to protect more than just 30 per cent of the ocean. To do so, they must pursue equitable, inclusive solutions that align with global goals. We need a future where community-led management of nearshore waters supports both people and nature. We owe it to each other, and to the ocean that gives us life.

The Conversation

Rashid Sumaila receives funding from SSHRC, NSERC and the World Bank. He is affiliated with Blue Ventures, Oceana, Pew Charitable Trusts, and the Tyler Prize Foundation as a board member.

ref. Governments can protect marine environments by supporting small-scale fishing – https://theconversation.com/governments-can-protect-marine-environments-by-supporting-small-scale-fishing-265651

Zohran Mamdani’s win shows how multilingualism bridges divides in diverse democracies

Source: The Conversation – Canada – By Kashif Raza, Postdoctoral Fellow, Faculty of Education, University of British Columbia

When Zohran Mamdani campaigned for New York City mayor, he didn’t sound like a typical American politician, speaking only English at his rallies and public appearances.

Instead, he switched between Arabic, Bangla, English, Hindi, Luganda, Spanish and Urdu to connect with diverse communities. He also made appearances on transnational media outlets to discuss issues that crossed borders.

I am a post-doctoral fellow at the University of British Columbia, studying the integration patterns of immigrants and how they’re shaped by the intersection of language, ethnicity and migration.

For me, Mamdani’s story is more than a local success. It signals how politics is being reshaped by migration and multilingualism and how language itself has become a foundation of belonging in diverse democracies.

Multilingual politics

Mamdani’s campaign began with a simple but powerful line:

“It’s time to take back our power and unleash the public sector to build housing for the many.”

This message resonated across the city’s working-class neighbourhoods — taxi drivers, nurses, delivery workers and students, many of them immigrants trying to make ends meet. What made it even more effective was how he delivered it: not just in English, but in the many languages New Yorkers speak.

He repeated his call for affordability and fairness in Arabic, Bangla, Urdu-Hindi, and Spanish. His campaign videos and flyers mixed languages the way people do in everyday life, switching easily between English and the languages of home.

This was about more than translation; it was about recognition and connection with people.

New York is one of the most linguistically diverse cities in the world, with more than 800 languages spoken. Nearly 35 per cent of its residents are born outside the United States.

Mamdani understood that voters don’t leave their languages behind when they migrate. They use them to make sense of work, community and politics. By speaking to them in those languages, he showed that their voices mattered in shaping the city’s future.

Political integration

This approach reflects what scholars of migration linguistics — the study of how language and mobility shape one another in the process of migration, settlement and belonging — describe as multilingual political integration.

It is a way migrants connect identity to civic participation. Mamdani’s campaign turned that bridge into a political strategy: one that viewed multilingualism not as an obstacle to democracy, but as its living proof.

It also serves as a quiet reality check on the long-standing “melting pot” ideal in the United States, which assumes immigrants must shed their languages and traditions to blend into a single American identity.

A transnational campaign

Mamdani’s multilingual strategy also reflected the transnational reality of modern migration. His Urdu interview on Pakistan’s Geo News and his criticism of India’s Narendra Modi during conversations with Indian-origin voters in the U.S. blurred the line between domestic and global audiences.

These appearances were not campaign gimmicks; they acknowledged that diaspora communities are shaped by more than one national story.

Migration linguistics helps explain this dynamic. It studies how language practices move across borders and connect places of origin, settlement and diaspora. In Mamdani’s case, multilingual communication created what scholars call transnational publics — shared spaces of conversation that stretch from New York to Karachi and Delhi.

When a politician addresses issues such as Islamophobia, immigration or housing in multiple languages, they are not only appealing to voters at home. They are engaging with a wider world of shared experiences that migration has woven together.




Read more:
How Zohran Mamdani’s ‘talent for listening’ spurred him to victory in the New York mayoral election


Culture as communication

Language was only part of Mamdani’s strategy. His campaign also used cultural expression — food, music and festivals — as forms of communication.

From Iftar gatherings during Ramadan to Diwali celebrations and South Asian street fairs, these events became spaces of multilingual interaction where taste, sound, and ritual carried political meaning.

Migration linguistics views such practices as intercultural competence: the use of cultural forms to express belonging and solidarity.

Mamdani’s campaign showed that civic participation doesn’t only happen in speeches or debates; it also happens in shared meals, songs and celebrations that remind people they belong to the same city.

Lessons for Canada

Mamdani’s brand of of politics holds lessons for Canada. Since I wrote on this topic earlier this year, immigrant and racialized voters are already changing how campaigns are organized and how communities mobilize.




Read more:
How racialized voters are reshaping Canadian politics through digital networks


Canada’s largest cities, in particular Toronto and Vancouver, are among the most linguistically diverse in the world. Yet a lot of political outreach still assumes an English- or French-only audience.

Mamdani’s campaign suggests another path. By engaging multilingual voters through their languages, stories and digital networks, politicians can build deeper, more authentic relationships.

It’s time for Canadian politicians to move beyond teleprompters and translators and learn and use minority languages as a genuine way to connect with multilingual voters as they make up a significant portion of the electorate.

The Conversation

Kashif Raza receives funding from the Social Sciences and Humanities Research Council (SSHRC) of Canada.

ref. Zohran Mamdani’s win shows how multilingualism bridges divides in diverse democracies – https://theconversation.com/zohran-mamdanis-win-shows-how-multilingualism-bridges-divides-in-diverse-democracies-269232

Why the 2025 federal budget won’t really make Canada strong

Source: The Conversation – Canada – By Robert Chernomas, Professor Of Economics, University of Manitoba

Canada’s 2025 federal budget, and those that follow in the coming years, may prove to be the most important since the beginning of the Second World War.

Canada’s longstanding, co-dependent economic relationship with the United States has abruptly and involuntarily ended following U.S. President Donald Trump’s imposition of tariffs and threats of annexation.

These actions have forced Canada to rethink its economic future and reduce its dependence on the U.S. Canada can no longer assume that 75 per cent of its merchandise exports will go to the U.S. in key sectors like energy and manufacturing, which together accounted for 19 per cent of Canada’s GDP in 2023.

No other country accounts for more than five per cent of Canadian exports, and about 45 per cent of foreign direct investment still originates from the U.S. Canada is in an economic war, with national security at risk and thousands of industrial jobs on the line in the immediate future.

How Ottawa responds through an alternative comprehensive economic strategy, beginning with the 2025 federal budget, will determine whether Canada can navigate this new geopolitical and economic reality.

Lessons from history

Canada’s history provides guidance on how to deal with a crisis of this scale. Given the isolationism south of the border, the only serious option for Canada is a national industrial policy similar to the one Canada (and the U.S.) had during the Second World War. That policy transformed Canada into a dynamic, advanced industrialized economy that paid dividends for decades

In 1933, the Canadian unemployment rate was 30 per cent, while 20 per cent of the population became dependent on government welfare for survival. The unemployment rate remained above 12 per cent until the start of the Second World War.

Between 1939 and 1945, as Canada restructured its economy for the war effort, gross national product more than doubled, the unemployment rate fell to one per cent and wages grew nearly 70 per cent.

A black and white photo of a middle-aged white man
A portrait of William Lyon Mackenzie King in 1942.
(Dutch National Archives)

This transformation was driven by William Lyon Mackenzie King’s government, which took control of the economy in the form of a publicly funded and a directed supply-side industrial policy. Resources and labour were channelled to produce for the war effort and the core needs of the community.

Twenty-eight Crown corporations were established, factories multiplied, corporate taxes were doubled and excess profits were taxed, generating revenue for these investments.

Canada’s ‘Golden Age’

The decades that followed the Second World War from the 1940s through to the early 1970s is often referred to as the Canadian “Golden Age.”

It was a time of unprecedented prosperity for Canada, characterized by rapid and stable economic growth, rising living standards, improved health outcomes, education-based upward mobility and Canada’s most income-equal period.

The extraordinary debt-to-income ratio that existed at the end of the Second World War (109 per cent) shrank to a fraction (20 per cent) as the Canadian gross domestic product expanded, driven by progressive government supply-side policy.

Public programs were not cut during this period, but expanded as spending for health care, education and welfare grew. The debt rose again as economic growth slowed after Canadian corporate tax rates were reduced by more than 50 per cent between 1960 and 2020, while corporate prerogatives replaced industrial strategy.

The Carney promise

Only weeks after the April 28 federal election, the newly re-minted finance minister, Françoise-Philippe Champagne, indicated that wartime industrial policies were serving as at least a reference point for the Liberal government.

“When I look at 2025, it reminds me of 1945, where C.D. Howe kind of reinvented modern industrial Canada. It’s one of these moments in history where we’re really rebuilding the nation,” he said.

Champagne was referring to Canada’s wartime industry minister, C.D. Howe, who implemented the War Measures Act in 1939 and the War Appropriation Act to rapidly industrialize the Canadian economy. In Howe’s words: “If private industry cannot or will not do the job, then the state must step in. The need is too great to wait.”

Today, Canada’s current private for-profit sector is a notorious laggard when it comes to research, development and investment compared to its G20 and OECD counterparts. Canadian companies are currently holding $727 billion in cash deposits, a situation once called out by Prime Minister Mark Carney as “dead money.”

The collapse of Canada’s corporate-led free trade and deep-integration model with the U.S. has presented a window of opportunity to influence a state-led, national industrial policy.

Does Carney’s budget come to the rescue?

The 2025 budget includes several important investment plans, including the new Build Canada Homes agency, science research and development, clean technology manufacturing, transit and health-care infrastructure, and digital transformation programs.

However, the Canada Strong budget remains too small in scale and relies far too much on indirect incentives for private-sector investment. These measures may or may not materialize, given the tariff threats and profit opportunities south of the border.

The budget’s claims of generational increases in investment — much of which was announced before budget day — appear to be more optics than anything meaningful.

The only significant new corporate tax measure, the “productivity super-deduction,” is tied directly to investment spending in targeted industries, and is a model supported by many progressive economists.

Canada needs to meet the moment

It’s worth remembering that the Mackenzie King government raised corporate taxes to finance direct investment. The higher tax rate corporations paid during the Golden Age were used to fund targeted investments and the expansion of Canada’s care economy, which in turn contributed not only to the welfare of the Canadian population, but also productivity growth in the economy.

By contrast, the 2025 budget provides modest increases to total public investment, but does not meet the challenge of the moment, despite the exaggerated narrative of a generational investment in Canada’s future.

A greater scale of investment and conditionality imposed on the private sector would make Canada a leader in green energy, sustainable agriculture, green transportation, biotechnology and a resilient and digitized, high valuated economy. Canada is now embroiled in a full scale economic war and needs to respond accordingly.

The Conversation

Robert Chernomas is a Professor of Economics at the University of Manitoba and a member of Elbows Up: A Practical Program for Canadian Sovereignty. I am not affiliated with a political party or industry association but I am politically active.

ref. Why the 2025 federal budget won’t really make Canada strong – https://theconversation.com/why-the-2025-federal-budget-wont-really-make-canada-strong-268984

We asked teachers about their experiences with AI in the classroom — here’s what they said

Source: The Conversation – Canada – By Nadia Delanoy, Assistant Professor, Leadership, Policy, and Governance and Learning Sciences, Werklund School of Education, University of Calgary

“As much as I appreciate professional learning, when it is all about what tools to use, it misses the mark,” said one teacher in a study about AI in classrooms. CC BY-NC

Since ChatGPT and other large language models burst into public consciousness, school boards are drafting policies, universities are hosting symposiums and tech companies are relentlessly promoting their latest AI-powered learning tools.

In the race to modernize education, artificial intelligence (AI) has become the new darling of policy innovation. While AI promises efficiency and personalization, it also introduces complexity, ethical dilemmas and new demands.

Teachers, who are at the heart of learning along with students, are watching this transformation with growing unease. For example, according to the Alberta Teachers’ Association, 80 to 90 per cent of educators surveyed expressed concern about AI’s potential negative effects on education.

To understand comprehensive policy needs, we must first understand classrooms — and teachers’ current realities.

As a researcher with expertise in technology-enhanced teaching and learning at the intersections of assessment, leadership and policy, I interviewed teachers from across Canada, with Erik Sveinson, a Bachelor of Education student. We asked them about their experiences with generative AI (GenAI) in the classroom.

Their stories help contextualize a reality of AI in a K-12 context, and offer insights around harnessing AI’s potential without harming education as a human-centred endeavour.

AI policy and teaching wisdom

This qualitative study involved 10 (grades 5 to 12) teachers from Alberta, Saskatchewan, Ontario and British Columbia.

We recruited participants through professional learning networks, teacher associations and district contacts, seeking to ensure a variety of perspectives from varied grade levels, subjects and geographic locations.

We thematically coded interview data, and then cross-referenced this with insights from a review of existing research about GenAI use in K-12 classrooms. We highlighted convergences or tensions between theories about assessment, teaching approaches in technology-enhanced environments, student learning and educator practices.

Across interviews, teachers described a widening gap between policy expectations and the emotional realities of classroom practice.

What we heard

The following themes emerged from our interviews:

1. The assessment crisis: Longstanding tools of assessment, such as the essay or the take-home project, have suddenly become vulnerable. Teachers are spending countless hours questioning the authenticity of student work.

All teachers interviewed consistently said they struggled with their current assessment practices and how students may be using GenAI in work. Confidence in the reliability of assessments have been challenging. The majority of teachers shared they felt they needed to consider students cheating more than ever given advancing GenAI technology.

2. Equity dilemmas: Teachers are on the front lines of seeing firsthand which students have unlimited access to the latest AI tools at home and which do not.

3. Teachers perceive both opportunities and challenges with AI. Great teaching is about fostering critical thinking and human connection. Ninety per cent of teachers interviewed faced complex challenges relating to equity and how best to support critical thinking in the classroom while building foundational knowledge. In particular, middle and high school teachers in core subject areas indicated students were using GenAI tools in their own time outside class without ethical guidance.

‘One more thing piled on’

One teacher from central Alberta said:

“AI is definitely helpful for my workflow, but right now it feels like one more thing piled onto an already impossible workload. The policy says, ‘embrace innovation,’ but where’s the guidance and support?”

Classrooms are dynamic ecosystems shaped by emotion, relationships and unpredictability. Teachers manage trauma, neurodiversity, language barriers and social inequities while delivering curriculum and meeting student achievement expectations.

Teachers say there’s little recognition of the cognitive load they already carry, or the time it takes to vet, adapt and ethically deploy AI tools. They say AI policies often treating educators as passive implementers of tech, rather than active agents of learning.

A high school teacher from eastern Canada shared:

“AI doesn’t understand the emotional labour of teaching. It can’t see the trauma behind a student’s meltdown. As much as I appreciate professional learning, when it is all about what tools to use, it misses the mark.”

This perspective highlights a broader finding: teachers are not resisting AI per se; they are resisting implementation that disregards their emotional expertise and contextual judgment. They want professional learning initiatives that honour the human and relational dimensions of their work.

Burnout, professional erosion

This disconnect is not just theoretical, it’s emotional. Teachers are reporting burnout, anxiety and a sense of professional erosion. A 2024 study found that 76.9 per cent of Canadian educators felt emotionally exhausted, and nearly half had considered leaving the profession. The introduction of AI, without proper training or support, is compounding that stress.




Read more:
Solving teacher shortages depends on coming together around shared aspirations for children


There’s also a growing fear reported by the Alberta Teachers’ Association that, if not implemented properly with support for teachers new to the profession, AI could deskill the profession.

A teacher in Vancouver shared:

“I am a veteran teacher and understand the fundamentals of teaching. For beginner teachers, when algorithms write report cards or generate lesson plans, what happens to teacher autonomy and the art of teaching?”

Turning teaching into a checklist?

Overall, the interview responses suggest what’s missing from AI policy is a fundamental understanding of teaching as a human-centred profession. As policymakers rush to integrate AI into digitized classrooms, they’re missing a critical truth: technology cannot fix what it may not understand.

Without clear guardrails and professional learning grounded in teacher and student-informed needs, AI risks becoming a tool of surveillance and standardization, rather than empowerment.




Read more:
Children’s best interests should anchor Canada’s approach to their online privacy


This tension between innovation and de-professionalization emerged across many teacher responses. Educators expressed optimism about AI’s potential to reduce workload, but also deep unease about how it could erode their professional judgment and relational roles with students.

A northern Ontario teacher said:

“There is hope with new technology, but I worry that AI will turn teaching into a checklist. We’re not technicians, we’re mentors, guides and sometimes lifelines.”

Teachers fear that without educator-led frameworks, AI could shift schooling from a human-centred practice to a compliance-driven one.

Responsible AI policy

If we want to harness AI’s potential without harming education as a human-centred endeavour with students and teachers at the core, we must rethink approaches to AI innovation in education. That starts with listening to teachers.

Teachers must be involved in the design, testing and evaluation of AI tools. Policies must prioritize ethics, transparency and equity. That includes regulating how student data is used, ensuring teachers can ascertain algorithmic bias and ethical implications and also protecting teacher discretion.

Third, we need to slow down. The pace of AI innovation is dizzying, but education isn’t a startup. It’s a public good. Policies must be evidence-based and grounded in the lived experiences of those who teach.

The Conversation

Nadia Delanoy receives funding from the University of Calgary.

ref. We asked teachers about their experiences with AI in the classroom — here’s what they said – https://theconversation.com/we-asked-teachers-about-their-experiences-with-ai-in-the-classroom-heres-what-they-said-265241

Menace terroriste en France : sur TikTok, une propagande djihadiste à portée des jeunes

Source: The Conversation – France in French (3) – By Laurène Renaut, Maîtresse de conférence au Celsa, Sorbonne Université

Dix ans après les attentats de 2015, la menace terroriste, toujours vive, s’est transformée : elle émane d’individus de plus en plus jeunes, présents sur le territoire français, sans lien avec des organisations structurées. La propagande djihadiste sur les réseaux sociaux, très facile d’accès, permettrait un « auto-endoctrinement » rapide. Entretien avec Laurène Renaut, spécialiste des cercles djihadistes en ligne.


The Conversation : Dix ans après les attentats de 2015, comment évolue la menace terroriste en France ?

Laurène Renaut : Le procureur national antiterroriste [Olivier Christen] a souligné que la menace djihadiste reste élevée et qu’elle a même tendance à croître au regard du nombre de procédures pour des contentieux djihadistes ces dernières années. Mais cette menace a muté. Elle est aujourd’hui endogène, moins commandée de l’étranger et plutôt liée à des individus inspirés par la propagande djihadiste, sans contact avec des organisations terroristes. Par ailleurs, il y a une évolution des profils depuis fin 2023 avec un rajeunissement des candidats au djihad armé. En 2023, 15 jeunes de moins de 21 ans étaient impliqués dans des projets d’attentats, 19 en 2024 et 17 en 2025. Ce phénomène de rajeunissement est européen, et pas seulement français. La seconde mutation réside dans une forme d’autoradicalisation de ces jeunes qui ne vont pas forcément avoir besoin de contacts avec les organisations terroristes pour exprimer des velléités de passage à l’acte au contact de la propagande djihadiste en ligne.

Enfin, ce qui semble se dessiner, ce sont des formes de basculement très rapides, que l’on n’observait pas il y a quelques années. Lorsque j’ai commencé mon travail de thèse, fin 2017, la radicalisation s’inscrivait sur du long terme, avec de nombreuses étapes, un environnement familial, des rencontres, des échanges en ligne. Or là, depuis fin 2023 début 2024, le délai entre le moment où ces jeunes commencent à consommer de la propagande en ligne et le moment où certains décident de participer à des actions violentes semble de plus en plus court.

Comment arrivez-vous à ces conclusions ?

L. R. : Je m’appuie ici sur les données fournies par le parquet national antiterroriste ainsi que sur des échanges avec des acteurs de terrain et professionnels de la radicalisation. Mon travail, depuis huit ans, consiste à analyser l’évolution des djihadosphères (espaces numériques où y est promu le djihad armé), sur des réseaux comme Facebook, X ou TikTok. En enquêtant sur ces communautés numériques djihadistes, j’essaie de comprendre comment les partisans de l’Organisation de l’État islamique parviennent à communiquer ensemble, malgré la surveillance des plateformes. Comment ils et elles se reconnaissent et interagissent ? Quels moyens ils déploient pour mener le « djihad médiatique » qu’ils considèrent comme essentiel pour défendre leur cause ?

Quels sont les profils des jeunes radicalisés dont on parle ?

L. R. : On sait que la radicalisation, quelle qu’elle soit, est un phénomène multifactoriel. Il n’y pas donc pas de profil type, mais des individus aux parcours variés, des jeunes scolarisés comme en décrochage scolaire, d’autres qui ont des problématiques familiales, traumatiques, identitaires ou de santé mentale. On retrouve néanmoins un dénominateur commun : une connexion aux réseaux sociaux. Et il est possible de faire un lien entre cette hyperconnexion aux réseaux, où circulent les messages djihadistes, et la forme d’autoradicalisation observée. On n’a plus besoin de rencontrer un ami qui va nous orienter vers un prêche ou un recruteur : il est aujourd’hui relativement facile d’accéder à des contenus djihadistes en ligne, voire d’en être submergé.

Peut-on faire un lien entre le rajeunissement et la présence des jeunes sur les réseaux sociaux ?

L. R. : Les organisations terroristes ont toujours eu tendance à cibler des jeunes pour leur énergie, leur combativité, parce qu’ils sont des proies manipulables aussi, en manque de repères, sensibles aux injustices et, bien sûr, aujourd’hui familiers des codes de la culture numérique. On sait aussi que les jeux vidéo sont devenus des portes d’entrée pour les recruteurs. Sur Roblox, par exemple, il est possible de harponner ces jeunes ou de les faire endosser des rôles de combattants en les faisant participer à des reconstitutions de batailles menées par l’État islamique en zone irako-syrienne.

Ce qu’on appelle l’enfermement algorithmique, c’est-à-dire le fait de ne recevoir qu’un type de contenu sélectionné par l’algorithme, joue-t-il un rôle dans ces évolutions ?

L. R. : Oui certainement. Sur TikTok, c’est assez spectaculaire. Aujourd’hui, si j’y tape quelques mots clés, que je regarde trois minutes d’une vidéo labellisée État islamique et que je réitère ce comportement, en quelques heures on ne me propose plus que du contenu djihadiste. Ce n’était pas du tout le cas lorsque je faisais ma thèse sur Facebook. Là, [sur TikTok,] je n’ai pas besoin de chercher, les contenus djihadistes viennent à moi.

Les réseaux sociaux sont censés lutter activement contre les contenus de propagande terroriste. Ce n’est donc pas le cas ?

L. R. : Ce que j’observe, c’est que la durée de vie de certains contenus violents sur TikTok reste importante et que des centaines de profils appelants au djihad armé et suivis par de larges communautés parviennent à maintenir une activité en ligne. Les spécialistes de la modération mettent en évidence que les contenus de nature pédocriminelle ou terroriste sont actuellement les mieux nettoyés et bénéficient d’une attention particulière des plateformes, mais celles-ci n’en demeurent pas moins submergées, ce qui explique que de nombreux contenus passent sous les radars. Sans compter que les partisans de l’État islamique déploient une certaine créativité, et même un savoir-faire, pour faire savoir qu’ils sont « là » sans se faire voir. Quand je tape « ma vengeance » par exemple (titre d’un chant djihadiste qui rend hommage aux terroristes du 13 novembre 2015), il est tout à fait possible, encore aujourd’hui, de retrouver des extraits de ce chant particulièrement violent. S’il est toujours présent en ligne, comme d’autres contenus de propagande, c’est parce que les militants djihadistes trouvent des astuces pour recycler d’anciens contenus et déjouer les stratégies de détection des plateformes (langage codé, brouillage du son et camouflage des images par exemple, afin d’éviter une reconnaissance automatique).

Le contenu de la propagande djihadiste sur les réseaux sociaux a-t-il évolué depuis 2015 ?

L. R. : En 2015, l’Organisation de l’État islamique avait encore une force de frappe importante en termes de propagande numérique. Puis elle est défaite militairement en Syrie et en Irak, en 2017, et on observe une nette baisse de la production de propagande. Mais il y a eu une certaine détermination chez ses partisans à rester en ligne, comme si les espaces numériques étaient des prolongements du champ de bataille militaire. Ont alors émergé des tactiques de camouflage et des incitations à une forme de résistance ou de patience avec une vision de long terme du combat pour « la cause ». L’objectif pour ces cybermilitants était d’être à la fois visibles pour leur réseau et invisible des « surveillants », tapis dans l’ombre mais prêts à agir le moment opportun.

Puis on note un pic d’activité de propagande qui coïncide aux massacres perpétrés par le Hamas, le 7 octobre 2023, en Israël. Il faut préciser que l’Organisation de l’État islamique est ennemie du Hamas qu’elle considère comme un groupe de faux musulmans (ou apostats). Néanmoins, le 7-Octobre a été un moment d’euphorie collective dans les djihadosphères, avec la volonté pour l’État islamique de promouvoir ses militants comme les seuls « vrais moudjahidine » (combattants pour la foi).

Aujourd’hui, dans les djihadosphères, cohabitent des contenus ultraviolents (formats courts) que certains jeunes consomment de manière frénétique et des contenus théoriques qui nécessitent une plus grande accoutumance à l’idéologie djihadiste.

Quels sont les principaux contenus des échanges de djihadistes sur les réseaux que vous étudiez ?

L. R. : On trouve des vidéos violentes, mais de nombreux contenus ne sont pas explicitement ou visuellement violents. Ils visent à enseigner le comportement du « vrai musulman » et à condamner les « faux musulmans » à travers le takfir (acte de langage qui consiste à déclarer mécréant une personne ou un groupe de personnes). Dans sa conception salafiste djihadiste, cette accusation de mécréance équivaut à la fois à une excommunication de l’islam et à un permis de tuer – puisque le sang du mécréant est considéré comme licite.

La grande question, que l’on retrouve de manière obsessionnelle, c’est « Comment être un vrai musulman ? Comment pratiquer le takfir ? Et comment éviter d’en être la cible ? » Pour l’État islamique et ses partisans, il y a les « vrais musulmans » d’un côté et les « faux musulmans » (apostats) ou les non-musulmans (mécréants) de l’autre. Il n’y a pas de zone grise ni de troisième voie. La plupart des débats dans les djihadosphères portent donc sur les frontières de l’islamité (l’identité musulmane) : à quelles actions est-elle conditionnée et qu’est-ce qui entraîne sa suspension ?

« Est-ce que je pratique l’islam comme il le faut ? Si je fais telle prière, si je parle à telle personne (à mes parents ou à mes amis qui ne sont pas musulmans, par exemple), est-ce que je suis encore musulman ? » Telles sont, parmi d’autres, les sources de préoccupation des acteurs de ces djihadosphères, la question identitaire étant centrale chez les jeunes concernés.

Dans cette propagande, il y a un lien très fort entre le fait de se sentir marginalisé et l’appartenance au « vrai islam »…

L. R. : Effectivement, un autre concept majeur, connecté au concept de takfir, c’est celui d’étrangeté (ghurba). Dans la propagande djihadiste, le « vrai musulman » est considéré comme un « étranger » et désigné comme tel.

Ce concept, qui n’est pas présent dans le Coran, renvoie à un hadith (recueil des actes et des déclarations du prophète Muhammad), qui attribue ces paroles au prophète Muhammed : « L’islam a commencé étranger et il redeviendra étranger, heureux soient les étrangers. » Pour l’expliquer brièvement, si l’islam a commencé étranger, c’est qu’il a d’abord été, tout comme ses premiers adeptes, incompris. En effet, ceux qui adhèrent à cette religion à l’époque et qui ont suivi le prophète lors de l’Hégire sont perçus comme des marginaux ou des fous et sont même réprimés.

Mais progressivement le message de Muhammed s’étend, et l’islam devient la norme dans une grande partie du monde ; les musulmans cessant d’y être perçus comme étranges ou anormaux. Selon la tradition prophétique, c’est à ce moment-là, quand la nation musulmane grandit, que les « vrais croyants » se diluent dans une masse de mécréants et de « faux musulmans » corrompus.

Aujourd’hui, l’État islamique s’appuie sur ce hadith pour dire que si on se sent étranger à cette terre de mécréance, à l’Occident, à sa propre famille, c’est qu’on est certainement sur le chemin du véritable islam. Leurs propagandistes se nourrissent d’une littérature apocalyptique qui met sur le même plan ces « étrangers » et « la secte sauvée » (al-firqah an-najiyah), le groupe de croyants qui combattra les mécréants jusqu’au Jugement dernier et qui, seul parmi les 73 factions de l’islam, gagnera le paradis.

Leur message est clair : aujourd’hui les « vrais musulmans » sont en minorité, marginalisés et mis à l’épreuve mais eux seuls accéderont au paradis. Cette rhétorique de l’étrangeté est centrale dans le discours djihadiste en ligne. Sur TikTok, on lit beaucoup de messages du type : « Si tu te sens seul ou rejeté, si personne ne te comprend, c’est peut-être parce que tu es un étranger, un “vrai musulman” appelé ici à combattre. »

The Conversation

Laurène Renaut ne travaille pas, ne conseille pas, ne possède pas de parts, ne reçoit pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’a déclaré aucune autre affiliation que son organisme de recherche.

ref. Menace terroriste en France : sur TikTok, une propagande djihadiste à portée des jeunes – https://theconversation.com/menace-terroriste-en-france-sur-tiktok-une-propagande-djihadiste-a-portee-des-jeunes-269222

Menace terroriste en France : sur TikTok, la propagande djihadiste en quelques clics

Source: The Conversation – France in French (3) – By Laurène Renaut, Maîtresse de conférence au Celsa, Sorbonne Université

Dix ans après les attentats de 2015, la menace terroriste, toujours vive, s’est transformée : elle émane d’individus de plus en plus jeunes, présents sur le territoire français, sans lien avec des organisations structurées. La propagande djihadiste sur les réseaux sociaux, très facile d’accès, permettrait un « auto-endoctrinement » rapide. Entretien avec Laurène Renaut, spécialiste des cercles djihadistes en ligne.


The Conversation : Dix ans après les attentats de 2015, comment évolue la menace terroriste en France ?

Laurène Renaut : Le procureur national antiterroriste [Olivier Christen] a souligné que la menace djihadiste reste élevée et qu’elle a même tendance à croître au regard du nombre de procédures pour des contentieux djihadistes ces dernières années. Mais cette menace a muté. Elle est aujourd’hui endogène, moins commandée de l’étranger et plutôt liée à des individus inspirés par la propagande djihadiste, sans contact avec des organisations terroristes. Par ailleurs, il y a une évolution des profils depuis fin 2023 avec un rajeunissement des candidats au djihad armé. En 2023, 15 jeunes de moins de 21 ans étaient impliqués dans des projets d’attentats, 19 en 2024 et 17 en 2025. Ce phénomène de rajeunissement est européen, et pas seulement français. La seconde mutation réside dans une forme d’autoradicalisation de ces jeunes qui ne vont pas forcément avoir besoin de contacts avec les organisations terroristes pour exprimer des velléités de passage à l’acte au contact de la propagande djihadiste en ligne.

Enfin, ce qui semble se dessiner, ce sont des formes de basculement très rapides, que l’on n’observait pas il y a quelques années. Lorsque j’ai commencé mon travail de thèse, fin 2017, la radicalisation s’inscrivait sur du long terme, avec de nombreuses étapes, un environnement familial, des rencontres, des échanges en ligne. Or là, depuis fin 2023 début 2024, le délai entre le moment où ces jeunes commencent à consommer de la propagande en ligne et le moment où certains décident de participer à des actions violentes semble de plus en plus court.

Comment arrivez-vous à ces conclusions ?

L. R. : Je m’appuie ici sur les données fournies par le parquet national antiterroriste ainsi que sur des échanges avec des acteurs de terrain et professionnels de la radicalisation. Mon travail, depuis huit ans, consiste à analyser l’évolution des djihadosphères (espaces numériques où y est promu le djihad armé), sur des réseaux comme Facebook, X ou TikTok. En enquêtant sur ces communautés numériques djihadistes, j’essaie de comprendre comment les partisans de l’Organisation de l’État islamique parviennent à communiquer ensemble, malgré la surveillance des plateformes. Comment ils et elles se reconnaissent et interagissent ? Quels moyens ils déploient pour mener le « djihad médiatique » qu’ils considèrent comme essentiel pour défendre leur cause ?

Quels sont les profils des jeunes radicalisés dont on parle ?

L. R. : On sait que la radicalisation, quelle qu’elle soit, est un phénomène multifactoriel. Il n’y pas donc pas de profil type, mais des individus aux parcours variés, des jeunes scolarisés comme en décrochage scolaire, d’autres qui ont des problématiques familiales, traumatiques, identitaires ou de santé mentale. On retrouve néanmoins un dénominateur commun : une connexion aux réseaux sociaux. Et il est possible de faire un lien entre cette hyperconnexion aux réseaux, où circulent les messages djihadistes, et la forme d’autoradicalisation observée. On n’a plus besoin de rencontrer un ami qui va nous orienter vers un prêche ou un recruteur : il est aujourd’hui relativement facile d’accéder à des contenus djihadistes en ligne, voire d’en être submergé.

Peut-on faire un lien entre le rajeunissement et la présence des jeunes sur les réseaux sociaux ?

L. R. : Les organisations terroristes ont toujours eu tendance à cibler des jeunes pour leur énergie, leur combativité, parce qu’ils sont des proies manipulables aussi, en manque de repères, sensibles aux injustices et, bien sûr, aujourd’hui familiers des codes de la culture numérique. On sait aussi que les jeux vidéo sont devenus des portes d’entrée pour les recruteurs. Sur Roblox, par exemple, il est possible de harponner ces jeunes ou de les faire endosser des rôles de combattants en les faisant participer à des reconstitutions de batailles menées par l’État islamique en zone irako-syrienne.

Ce qu’on appelle l’enfermement algorithmique, c’est-à-dire le fait de ne recevoir qu’un type de contenu sélectionné par l’algorithme, joue-t-il un rôle dans ces évolutions ?

L. R. : Oui certainement. Sur TikTok, c’est assez spectaculaire. Aujourd’hui, si j’y tape quelques mots clés, que je regarde trois minutes d’une vidéo labellisée État islamique et que je réitère ce comportement, en quelques heures on ne me propose plus que du contenu djihadiste. Ce n’était pas du tout le cas lorsque je faisais ma thèse sur Facebook. Là, [sur TikTok,] je n’ai pas besoin de chercher, les contenus djihadistes viennent à moi.

Les réseaux sociaux sont censés lutter activement contre les contenus de propagande terroriste. Ce n’est donc pas le cas ?

L. R. : Ce que j’observe, c’est que la durée de vie de certains contenus violents sur TikTok reste importante et que des centaines de profils appelants au djihad armé et suivis par de larges communautés parviennent à maintenir une activité en ligne. Les spécialistes de la modération mettent en évidence que les contenus de nature pédocriminelle ou terroriste sont actuellement les mieux nettoyés et bénéficient d’une attention particulière des plateformes, mais celles-ci n’en demeurent pas moins submergées, ce qui explique que de nombreux contenus passent sous les radars. Sans compter que les partisans de l’État islamique déploient une certaine créativité, et même un savoir-faire, pour faire savoir qu’ils sont « là » sans se faire voir. Quand je tape « ma vengeance » par exemple (titre d’un chant djihadiste qui rend hommage aux terroristes du 13 novembre 2015), il est tout à fait possible, encore aujourd’hui, de retrouver des extraits de ce chant particulièrement violent. S’il est toujours présent en ligne, comme d’autres contenus de propagande, c’est parce que les militants djihadistes trouvent des astuces pour recycler d’anciens contenus et déjouer les stratégies de détection des plateformes (langage codé, brouillage du son et camouflage des images par exemple, afin d’éviter une reconnaissance automatique).

Le contenu de la propagande djihadiste sur les réseaux sociaux a-t-il évolué depuis 2015 ?

L. R. : En 2015, l’Organisation de l’État islamique avait encore une force de frappe importante en termes de propagande numérique. Puis elle est défaite militairement en Syrie et en Irak, en 2017, et on observe une nette baisse de la production de propagande. Mais il y a eu une certaine détermination chez ses partisans à rester en ligne, comme si les espaces numériques étaient des prolongements du champ de bataille militaire. Ont alors émergé des tactiques de camouflage et des incitations à une forme de résistance ou de patience avec une vision de long terme du combat pour « la cause ». L’objectif pour ces cybermilitants était d’être à la fois visibles pour leur réseau et invisible des « surveillants », tapis dans l’ombre mais prêts à agir le moment opportun.

Puis on note un pic d’activité de propagande qui coïncide aux massacres perpétrés par le Hamas, le 7 octobre 2023, en Israël. Il faut préciser que l’Organisation de l’État islamique est ennemie du Hamas qu’elle considère comme un groupe de faux musulmans (ou apostats). Néanmoins, le 7-Octobre a été un moment d’euphorie collective dans les djihadosphères, avec la volonté pour l’État islamique de promouvoir ses militants comme les seuls « vrais moudjahidine » (combattants pour la foi).

Aujourd’hui, dans les djihadosphères, cohabitent des contenus ultraviolents (formats courts) que certains jeunes consomment de manière frénétique et des contenus théoriques qui nécessitent une plus grande accoutumance à l’idéologie djihadiste.

Quels sont les principaux contenus des échanges de djihadistes sur les réseaux que vous étudiez ?

L. R. : On trouve des vidéos violentes, mais de nombreux contenus ne sont pas explicitement ou visuellement violents. Ils visent à enseigner le comportement du « vrai musulman » et à condamner les « faux musulmans » à travers le takfir (acte de langage qui consiste à déclarer mécréant une personne ou un groupe de personnes). Dans sa conception salafiste djihadiste, cette accusation de mécréance équivaut à la fois à une excommunication de l’islam et à un permis de tuer – puisque le sang du mécréant est considéré comme licite.

La grande question, que l’on retrouve de manière obsessionnelle, c’est « Comment être un vrai musulman ? Comment pratiquer le takfir ? Et comment éviter d’en être la cible ? » Pour l’État islamique et ses partisans, il y a les « vrais musulmans » d’un côté et les « faux musulmans » (apostats) ou les non-musulmans (mécréants) de l’autre. Il n’y a pas de zone grise ni de troisième voie. La plupart des débats dans les djihadosphères portent donc sur les frontières de l’islamité (l’identité musulmane) : à quelles actions est-elle conditionnée et qu’est-ce qui entraîne sa suspension ?

« Est-ce que je pratique l’islam comme il le faut ? Si je fais telle prière, si je parle à telle personne (à mes parents ou à mes amis qui ne sont pas musulmans, par exemple), est-ce que je suis encore musulman ? » Telles sont, parmi d’autres, les sources de préoccupation des acteurs de ces djihadosphères, la question identitaire étant centrale chez les jeunes concernés.

Dans cette propagande, il y a un lien très fort entre le fait de se sentir marginalisé et l’appartenance au « vrai islam »…

L. R. : Effectivement, un autre concept majeur, connecté au concept de takfir, c’est celui d’étrangeté (ghurba). Dans la propagande djihadiste, le « vrai musulman » est considéré comme un « étranger » et désigné comme tel.

Ce concept, qui n’est pas présent dans le Coran, renvoie à un hadith (recueil des actes et des déclarations du prophète Muhammad), qui attribue ces paroles au prophète Muhammed : « L’islam a commencé étranger et il redeviendra étranger, heureux soient les étrangers. » Pour l’expliquer brièvement, si l’islam a commencé étranger, c’est qu’il a d’abord été, tout comme ses premiers adeptes, incompris. En effet, ceux qui adhèrent à cette religion à l’époque et qui ont suivi le prophète lors de l’Hégire sont perçus comme des marginaux ou des fous et sont même réprimés.

Mais progressivement le message de Muhammed s’étend, et l’islam devient la norme dans une grande partie du monde ; les musulmans cessant d’y être perçus comme étranges ou anormaux. Selon la tradition prophétique, c’est à ce moment-là, quand la nation musulmane grandit, que les « vrais croyants » se diluent dans une masse de mécréants et de « faux musulmans » corrompus.

Aujourd’hui, l’État islamique s’appuie sur ce hadith pour dire que si on se sent étranger à cette terre de mécréance, à l’Occident, à sa propre famille, c’est qu’on est certainement sur le chemin du véritable islam. Leurs propagandistes se nourrissent d’une littérature apocalyptique qui met sur le même plan ces « étrangers » et « la secte sauvée » (al-firqah an-najiyah), le groupe de croyants qui combattra les mécréants jusqu’au Jugement dernier et qui, seul parmi les 73 factions de l’islam, gagnera le paradis.

Leur message est clair : aujourd’hui les « vrais musulmans » sont en minorité, marginalisés et mis à l’épreuve mais eux seuls accéderont au paradis. Cette rhétorique de l’étrangeté est centrale dans le discours djihadiste en ligne. Sur TikTok, on lit beaucoup de messages du type : « Si tu te sens seul ou rejeté, si personne ne te comprend, c’est peut-être parce que tu es un étranger, un “vrai musulman” appelé ici à combattre. »

The Conversation

Laurène Renaut ne travaille pas, ne conseille pas, ne possède pas de parts, ne reçoit pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’a déclaré aucune autre affiliation que son organisme de recherche.

ref. Menace terroriste en France : sur TikTok, la propagande djihadiste en quelques clics – https://theconversation.com/menace-terroriste-en-france-sur-tiktok-la-propagande-djihadiste-en-quelques-clics-269222