What makes ‘great powers’ great? And how will they adapt to a multipolar world?

Source: The Conversation – Global Perspectives – By Andrew Latham, Professor of Political Science, Macalester College

When greats clash! In this case, in the 1974 film ‘Godzilla vs. Mechagodzilla.’ FilmPublicityArchive/United Archives via Getty Images

Many column inches have been dedicated to dissecting the “great power rivalry” currently playing out between China and the U.S.

But what makes a power “great” in the realm of international relations?

Unlike other states, great powers possess a capacity to shape not only their immediate surroundings but the global order itself – defining the rules, norms and structures that govern international politics. Historically, they have been seen as the architects of world systems, exercising influence far beyond their neighborhoods.

The notion of great powers came about to distinguish between the most and least powerful states. The concept gained currency after the 1648 Peace of Westphalia and the Congress of Vienna in 1815 – events in Europe that helped establish the notion of sovereign states and the international laws governing them.

Whereas the great powers of the previous eras – for example, the Roman Empire – sought to expand their territory at almost every turn and relied on military power to do so, the modern great power utilizes a complex tapestry of diplomatic pressure, economic leverage and the assertions of international law. The order emerging out of Westphalia enshrined the principles of national sovereignty and territorial integrity, which allowed these powers to pursue a balance of power as codified by the Congress of Vienna based on negotiation as opposed to domination.

This transformation represented a momentous development in world politics: At least some portion of the legitimacy of a state’s control was now realized through its relationships and capacity to keep the peace, rather than resting solely on its ability to use force.

From great to ‘super’

Using their material capabilities – economic strength, military might and political influence – great powers have been able to project power across multiple regions and dictate the terms of international order.

In the 19th-century Concert of Europe, the great powers – Britain, France, Austria, Prussia and Russia – collectively managed European politics, balancing power to maintain stability. Their influence extended globally through imperial expansion, trade and the establishment of norms that reflected their priorities.

During the 20th century, the Cold War brought a stark distinction between great powers and other states. The U.S. and the Soviet Union, as the era’s two “superpowers,” dominated the international system, shaping it through a rivalry that encompassed military alliances, ideological competition and economic systems. Great powers in this context were not merely powerful states but the central actors defining the structure of global politics.

Toward a multipolar world

The post-Cold War period briefly ushered in a unipolar moment, with the U.S. as the sole great power capable of shaping the international system on a global scale.

This era was marked by the expansion of liberal internationalism, economic globalization and U.S.-led-and-constructed multilateralism.

However, the emergence of new centers of power, particularly China and to a lesser extent Russia, has brought the unipolar era to a close, ushering in a multipolar world where the distinctive nature of great powers is once again reshaped.

In this system, great powers are states with the material capabilities and strategic ambition to influence the global order as a whole.

And here they differ from regional powers, whose influence is largely confined to specific areas. Nations such as Turkey, India, Australia, Brazil and Japan are influential within their neighborhoods. But they lack the global reach of the U.S. or China to fundamentally alter the international system.

Instead, the roles of these regional powers is often defined by stabilizing their regions, addressing local challenges or acting as intermediaries in great power competition.

Challenging greatness

Yet the multipolar world presents unique challenges for today’s great powers. The diffusion of power means that no single great power can dominate the system as the U.S. did in the post-Cold War unipolar era.

Instead, today’s great powers must navigate complex dynamics, balancing competition with cooperation. For instance, the rivalry between Washington and Beijing is now a defining feature of global politics, spanning trade, technology, military strategy and ideological influence. Meanwhile, Russia’s efforts to maintain its great power status have resulted in more assertive, though regionally focused, actions that nonetheless have global implications.

Great powers must also contend with the constraints of interdependence. The interconnected nature of the global economy, the proliferation of advanced technologies and the rise of transnational challenges such as climate change and pandemics limit the ability of any one great power to unilaterally dictate outcomes. This reality forces great powers to prioritize their core interests while finding ways to manage global issues through cooperation, even amid intense competition.

As the world continues to adjust to multiple centers of power, the defining feature of great powers remains an unmatched capacity to project influence globally and define the parameters of the international order.

Whether through competition, cooperation or conflict, the actions of great powers will, I believe, continue to shape the trajectory of the global system, making their distinctiveness as central players in international relations more relevant than ever.

This article is part of a series explaining foreign policy terms commonly used but rarely explained.

The Conversation

Andrew Latham 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. What makes ‘great powers’ great? And how will they adapt to a multipolar world? – https://theconversation.com/what-makes-great-powers-great-and-how-will-they-adapt-to-a-multipolar-world-260969

Europe is stuck in a bystander role over Iran’s nuclear program after US, Israeli bombs establish facts on the ground

Source: The Conversation – Global Perspectives – By Garret Martin, Hurst Senior Professorial Lecturer, Co-Director Transatlantic Policy Center, American University School of International Service

Iran Foreign Minister Hossein Amirabdollahian, right, attends a news conference with EU foreign affairs representative Josep Borrell in Tehran on June 25, 2022. Atta KenareAFP via Getty Images

The U.S. bombing of three Iranian nuclear facilities on June 22, 2025, sent shock waves around the world. It marked a dramatic reversal for the Trump administration, which had just initiated negotiations with Tehran over its nuclear program. Dispensing with diplomacy, the U.S. opted for the first time for direct military involvement in the then-ongoing Israeli-Iranian conflict.

European governments have long pushed for a diplomatic solution to Tehran’s nuclear ambitions. Yet, the reaction in the capitals of Europe to the U.S. bombing of the nuclear facilities was surprisingly subdued.

European Commission President Ursula von der Leyen noted Israel’s “right to defend itself and protect its people.” German Chancellor Friedrich Merz was equally supportive, arguing that “this is dirty work that Israel is doing for all of us.” And a joint statement by the E3 – France, the U.K. and Germany – tacitly justified the U.S. bombing as necessary to prevent the possibility of Iran developing nuclear weapons.

Europe’s responses to the Israeli and American strikes were noteworthy because of how little they discussed the legality of the attacks. There was no such hesitation when Russia targeted civilian nuclear energy infrastructure in Ukraine in 2022.

But the timid reaction also underscored Europe’s bystander role, contrasting with its past approach on that topic. Iran’s nuclear program had been a key focal point of European diplomacy for years. The E3 nations initiated negotiations with Tehran back in 2003. They also helped to facilitate the signing of the 2015 Iran nuclear deal, which also included Russia, the European Union, China, the U.S. and Iran. And the Europeans sought to preserve the agreement, even after the unilateral U.S. withdrawal in 2018 during President Donald Trump’s first term.

As a scholar of transatlantic relations and security, I believe Europe faces long odds to once again play an impactful role in strengthening the cause of nuclear nonproliferation with Iran. Indeed, contributing to a new nuclear agreement with Iran would require Europe to fix a major rift with Tehran, overcome its internal divisions over the Middle East and manage a Trump administration that seems less intent on being a reliable ally for Europe.

Growing rift between Iran and Europe

For European diplomats, the 2015 deal was built on very pragmatic assumptions. It only covered the nuclear dossier, as opposed to including other areas of contention such as human rights or Iran’s ballistic missile program. And it offered a clear bargain: In exchange for greater restrictions on its nuclear program, Iran could expect the lifting of some existing sanctions and a reintegration into the world economy.

As a result, the U.S. withdrawal from the deal in 2018 posed a fundamental challenge to the status quo. Besides exiting, the Trump White House reimposed heavy secondary sanctions on Iran, which effectively forced foreign companies to choose between investing in the U.S. and Iranian markets. European efforts to mitigate the impact of these U.S. sanctions failed, thus undermining the key benefit of the deal for Iran: helping its battered economy. It also weakened Tehran’s faith in the value of Europe as a partner, as it revealed an inability to carve real independence from the U.S.

A man with blond hair walks past a group of people in suits.
U.S. President Donald Trump walks past French President Emmanuel Macron, center, and German Chancellor Friedrich Merz, right, in The Hague, Netherlands, on June 25, 2025.
Christian Hartmann/AFP via Getty Images

After 2018, relations between Europe and Iran deteriorated significantly. Evidence of Iranian state-sponsored terrorism and Iran-linked plots on European soil hardly helped. Moreover, Europeans strongly objected to Iran supplying Russia with drones in support of Moscow’s invasion of Ukraine – and later on, ballistic missiles as well. On the flip side, Iran deeply objected to European support for Israel’s war in the Gaza Strip in the aftermath of the Oct. 7, 2023, attacks.

These deep tensions remain a significant impediment to constructive negotiations on the nuclear front. Neither side currently has much to offer to the other, nor can Europe count on any meaningful leverage to influence Iran. And Europe’s wider challenges in its Middle East policy only compound this problem.

Internal divisions

In 2015, Europe could present a united front on the Iranian nuclear deal in part because of its limited nature. But with the nonproliferation regime now in tatters amid Trump’s unilateral actions and the spread of war across the region, it is now far harder for European diplomats to put the genie back in the bottle. That is particularly true given the present fissures over increasingly divisive Middle East policy questions and the nature of EU diplomacy.

Europe remains very concerned about stability in the Middle East, including how conflicts might launch new migratory waves like in 2015-16, when hundreds of thousands of Syrians fled to mainland Europe. The EU also remains very active economically in the region and is the largest funder of the Palestinian Authority. But it has been more of a “payer than player” in the region, struggling to translate economic investment into political influence.

In part, this follows from the longer-term tendency to rely on U.S. leadership in the region, letting Washington take the lead in trying to solve the Israeli-Palestinian conflict. But it also reflects the deeper divisions between EU member nations.

With foreign policy decisions requiring unanimity, EU members have often struggled to speak with one voice on the Middle East. Most recently, the debates over whether to suspend the economic association agreement with Israel over its actions in Gaza or whether to recognize a Palestinian state clearly underscored the existing EU internal disagreements.

Unless Europe can develop a common approach toward the Middle East, it is hard to see it having enough regional influence to matter in future negotiations over Iran’s nuclear program. This, in turn, would also affect how it manages its crucial, but thorny, relations with the U.S.

Europe in the shadow of Trump

The EU was particularly proud of the 2015 nuclear deal because it represented a strong symbol of multilateral diplomacy. It brought together great powers in the spirit of bolstering the cause of nuclear nonproliferation.

Smoke is seen rising from a group of buildings
Smoke rises from a building in Tehran after the Iranian capital was targeted by Israeli airstrikes on June 23, 2025.
Elyas/Middle East Images/AFP via Getty Images

Ten years on, the prospects of replicating such international cooperation seem rather remote. Europe’s relations with China and Russia – two key signers of the original nuclear deal – have soured dramatically in recent years. And ties with the United States under Trump have also been particularly challenging.

Dealing with Washington, in the context of the Iran nuclear program, presents a very sharp dilemma for Europe.

Trying to carve a distinct path may be appealing, but it lacks credibility at this stage. Recent direct talks with Iranian negotiators produced little, and Europe is not in a position to give Iran guarantees that it would not face new strikes from Israel.

And pursuing an independent path could easily provoke the ire of Trump, which Europeans are keen to avoid. There has already been a long list of transatlantic disputes, whether over trade, Ukraine or defense spending. European policymakers would be understandably reticent to invest time and resources in any deal that Trump could again scuttle at a moment’s notice.

Trump, too, is scornful of what European diplomacy could achieve, declaring recently that Iran doesn’t want to talk to Europe. He has instead prioritized bilateral negotiations with Tehran. Alignment with the U.S., therefore, may not translate into any great influence. Trump’s decision to bomb Iran, after all, happened without forewarning for his allies.

Thus, Europe will continue to pay close attention to Iran’s nuclear program. But, constrained by poor relations with Tehran and its internal divisions on the Middle East, it is unlikely that it will carve out a major role on the nuclear dossier as long as Trump is in office.

The Conversation

Garret Martin receives funding from the European Union for the organization, the Transatlantic Policy Center, that he co-directs.

ref. Europe is stuck in a bystander role over Iran’s nuclear program after US, Israeli bombs establish facts on the ground – https://theconversation.com/europe-is-stuck-in-a-bystander-role-over-irans-nuclear-program-after-us-israeli-bombs-establish-facts-on-the-ground-260740

China’s insertion into India-Pakistan waters dispute adds a further ripple in South Asia

Source: The Conversation – Global Perspectives – By Pintu Kumar Mahla, Research Associate at the Water Resources Research Institute, University of Arizona

Indian Border Security Force soldiers patrol near the line of control in Kashmir. Nitin Kanotra/Hindustan Times via Getty Images

With the future of a crucial water-sharing treaty between India and Pakistan up in the air, one outside party is looking on with keen interest: China.

For 65 years, the Indus Waters Treaty has seen the two South Asian rivals share access and use of the Indus Basin, a vast area covered by the Indus River and its tributaries that also stretches into Afghanistan and China.

For much of that history, there has been widespread praise for the agreement as a successful demonstration of cooperation between adversarial states over a key shared resource. But experts have noted the treaty has long held the potential for conflict. Drafters failed to factor in the effects of climate change, and the Himalayan glaciers that feed the rivers are now melting at record rates, ultimately putting at risk the long-term sustainability of water supply. Meanwhile, the ongoing conflict over Kashmir, where much of the basin is situated, puts cooperation at risk.

With treaty on ice, China steps in

That latest provocation threatening the treaty was a terrorist attack in the Indian union territory of Jammu and Kashmir on April 22, 2025. In response to that attack, which India blamed on Pakistan and precipitated a four-day confrontation, New Delhi temporarily suspended the treaty.

But even before that attack, India and Pakistan had been locked in negotiation over the future of the treaty – the status of which has been in the hands of international arbitrators since 2016. In the latest development, on June 27, 2025, the Permanent Court of Arbitration issued a supplementary award in favor of Pakistan, arguing that India’s holding of the treaty in abeyance did not affect its jurisdiction over the case. Moreover, the treaty does not allow for either party to unilaterally suspend the treaty, the ruling suggested.

Amid the wrangling over the treaty’s future, Pakistan has turned to China for diplomatic and strategic support. Such support was evident during the conflict that took place following April’s terrorist attack, during which Pakistan employed Chinese-made fighter jets and other military equipment against its neighbor.

Meanwhile, in an apparent move to counter India’s suspension of the treaty, China and Pakistan have ramped up construction of a major dam project that would provide water supply and electricity to parts of Pakistan.

So, why is China getting involved? In part, it reflects the strong relationship between Pakistan and China, developed over six decades.

But as an expert in hydro politics, I believe Beijing’s involvement raises concerns: China is not a neutral observer in the dispute. Rather, Beijing has long harbored a desire to increase its influence in the region and to counter an India long seen as a rival. Given the at-times fraught relationship between China and India – the two countries went to war in 1962 and continue to engage in sporadic border skirmishes – there are concerns in New Delhi that Beijing may respond by disrupting the flow of rivers in its territory that feed into India.

In short, any intervention by Beijing over the Indus Waters Treaty risks stirring up regional tensions.

Wrangling over waters

The Indus Waters Treaty has already endured three armed conflicts between Pakistan and India, and until recently it served as an exemplar of how to forge a successful bilateral agreement between two rival neighbors.


Riccardo Pravettoni, CC BY-SA

Under the initial terms of the treaty, which each country signed in 1960, India was granted control over three eastern rivers the countries share – Ravi, Beas and Satluj – with an average annual flow of 40.4 billion cubic meters. Meanwhile, Pakistan was given access to almost 167.2 billion cubic meters of water from the western rivers – Indus, Jhelum and Chenab.

In India, the relatively smaller distribution has long been the source of contention, with many believing the treaty’s terms are overly generous to Pakistan. India’s initial demand was for 25% of the Indus waters.

For Pakistan, the terms of the division of the Indus Waters Treaty are painful because they concretized unresolved land disputes tied to the partition of India in 1947. In particular, the division of the rivers is framed within the broader political context of Kashmir. The three major rivers – Indus, Jhelum and Chenab – flow through Indian-administered Jammu and Kashmir before entering the Pakistan-controlled western part of the Kashmir region.

But the instability of the Kashmir region – disputes around the Line of Control separating the Indian- and Pakistan-controlled areas are common – underscores Pakistan’s water vulnerability.

Nearly 65% of Pakistanis live in the Indus Basin region, compared with 14% for India. It is therefore not surprising that Pakistan has warned that any attempt to cut off the water supply, as India has threatened, would be considered an act of war.

It also helps to explain Pakistan’s desire to develop hydropower on the rivers it controls. One-fifth of Pakistan’s electricity comes from hydropower, and nearly 21 hydroelectric power plants are located in the Indus Basin region.

Since Pakistan’s economy relies heavily on agriculture and the water needed to maintain agricultural land, the fate of the Indus Waters Treaty is of the utmost importance to Pakistan’s leaders.

Such conditions have driven Islamabad to be a willing partner with China in a bid to shore up its water supply.

China provides technical expertise and financial support to Pakistan for numerous hydropower projects in Pakistan, including the Diamer Bhasha Dam and Kohala Hydropower Project. These projects play a significant role in addressing Pakistan’s energy requirements and have been a key aspect of the transboundary water relationship between the two nations.

Using water as a weapon?

With it’s rivalry with India and its desire to simultaneously work with Pakistan on numerous issues, China increasingly sees itself as a stakeholder in the Indus Waters Treaty, too. Chinese media narratives have framed India as the aggressor in the dispute, warning of the danger of using “water as a weapon” and noting that the source of the Indus River lies in China’s Western Tibet region.

Doing so fits Beijing’ s greater strategic presence in South Asian politics. After the terrorist attack, China Foreign Minister Wang Yi reaffirmed China’s support for Pakistan, showcasing the relationship as an “all-weather strategic” partnership and referring to Pakistan as an “ironclad friend.”

And in response to India’s suspension of the treaty, China announced it was to accelerate work on the significant Mohmand hydropower project on the tributary of the Indus River in Pakistan.

Two foundation stones are seen either side of a river.
Construction at the Mohmand Dam.
Pakistan Water and Power Development Authority

Chinese investment in Pakistan’s hydropower sector presents substantial opportunities for both countries in regards to energy security and promoting economic growth.

The Indus cascade project under the China-Pakistan Economic Corridor initiative, for example, promises to provide cumulative hydropower generation capacity of around 22,000 megawatts. Yet the fact that project broke ground in Gilgit-Baltistan, a disputed area in Pakistan-controlled Kashmir, underscores the delicacy of the situation.

Beijing’s backing of Pakistan is largely motivated by a mix of economic and geopolitical interests, particularly in legitimizing the China-Pakistan Economic Corridor. But it comes at the cost of stirring up regional tensions.

As such, the alignment of Chinese and Pakistani interests in developing hydro projects can pose a further challenge to the stability of South Asia’s water-sharing agreements, especially in the Indus Basin. Recently, the chief minister of the Indian state of Arunachal Pradesh, which borders China, warned that Beijing’s hydro projects in the Western Tibet region amount to a ticking “water bomb.”

To diffuse such tensions – and to get the Indus Waters Treaty back on track – it behooves India, China and Pakistan to engage in diplomacy and dialogue. Such engagement is, I believe, essential in addressing the ongoing water-related challenges in South Asia.

The Conversation

Pintu Kumar Mahla is affiliated with the Water Resources Research Center, the University of Arizona. He is also a member of the International Association of Water Law (AIDA).

Pintu Kumar Mahla has not received funding related to this article.

ref. China’s insertion into India-Pakistan waters dispute adds a further ripple in South Asia – https://theconversation.com/chinas-insertion-into-india-pakistan-waters-dispute-adds-a-further-ripple-in-south-asia-258891

Why is Israel bombing Syria?

Source: The Conversation – Global Perspectives – By Ali Mamouri, Research Fellow, Middle East Studies, Deakin University

Conflict in Syria has escalated with Israel launching bombing raids against its northern neighbour.

It follows months of fluctuating tensions in southern Syria between the Druze minority and forces aligned with the new government in Damascus. Clashes erupted in the last few days, prompting Israeli airstrikes in defence of the Druze by targeting government bases, tanks, and heavy weaponry.

Israel Minister Amichai Chikli has called the Syrian president Ahmed al-Sharaa

a terrorist, a barbaric murderer who should be eliminated without delay.

Despite the incendiary language, a ceasefire has been reached, halting the fighting – for now.

Syrian forces have begun withdrawing heavy military equipment from the region, while Druze fighters have agreed to suspend armed resistance, allowing government troops to regain control of the main Druze city of Suwayda.

What do the Druze want?

The Druze are a small religious minority estimated at over one million people, primarily concentrated in the mountainous regions of Lebanon, Syria, Israel, and Jordan.

In Syria, their population is estimated at around 700,000 (of around 23 million total Syrian population), with the majority residing in the southern As-Suwayda Governorate – or province – which serves as their traditional stronghold.

Since the 2011 uprising against the Assad regime, the Druze have maintained a degree of autonomy, successfully defending their territory from various threats, including ISIS and other jihadist groups.

Following Assad’s fall late last year, the Druze — along with other minority groups such as the Kurds in the east and Alawites in the west — have called for the country to be federalized.

They advocate for a decentralised model that would grant greater autonomy to regional communities.

However, the transitional government in Damascus is pushing for a centralised state and seeking to reassert full control over the entire Syrian territory. This fundamental disagreement has led to periodic clashes between Druze forces and government-aligned troops.

Despite the temporary ceasefire, tensions remain high. Given the core political dispute remains unresolved, many expect renewed conflict to erupt in the near future.

Why is Israel involved?

The ousting of the Assad regime created a strategic opening for Israel to expand its influence in southern Syria. Israel’s involvement is driven by two primary concerns:

1. Securing its northern border

Israel views the power vacuum in Syria’s south as a potential threat, particularly the risk of anti-Israeli militias establishing a foothold near its northern border.

During the recent clashes, the Israeli military declared

The Israeli Defence Forces will not allow a military threat to exist in southern Syria and will act against it.

Likewise, Prime Minister Benjamin Netanyahu, who has stated he will not allow Syrian forces south of Damascus:

We are acting to prevent the Syrian regime from harming them [the Druze] and to ensure the demilitarisation of the area adjacent to our border with Syria.

In line with these warnings, the Israeli Air Force has conducted extensive strikes against Syrian military infrastructure, targeting bases, aircraft, tanks, and heavy weaponry.

These operations are intended to prevent any future buildup of military capacity that could be used against Israel from the Syrian side of the border.

2. Supporting a federated Syria

Israel is backing the two prominent allied minorities in Syria — the Kurds in the northeast and the Druze in the south — in their push for a federal governance model.

A fragmented Syria, divided along ethnic and religious lines, is seen by some Israeli policymakers as a way to maintain Israeli domination in the region.

This vision is part of what some Israeli officials have referred to as a “New Middle East” — one where regional stability and normalisation emerge through reshaped borders and alliances.

Israeli Foreign Minister Gideon Sa’ar recently echoed this strategy, stating:

A single Syrian state with effective control and sovereignty over all its territory is unrealistic.

For Israel, the logical path forward is autonomy for the various minorities in Syria within a federal structure.

The United States’ role?

According to unconfirmed reports, Washington has privately urged Israel to scale back its military strikes on Syria in order to prevent further escalation and preserve regional stability.

The US is promoting increased support for Syria’s new regime in an effort to help it reassert control and stabilise the country.

There are also indications the US and its allies are encouraging the Syrian government to move toward normalisation with Israel. Reports suggest Tel Aviv has held talks with the new Sharaa-led regime about the possibility of Syria joining the Abraham Accords (diplomatic agreements between Israel and several Arab states), which the regime in Damascus appears open to.

US Special Envoy Tom Barrack has described the recent clashes as “worrisome”, calling for de-escalation and emphasising the need for

a peaceful, inclusive outcome for all stakeholders – including the Druze, Bedouin tribes, the Syrian government, and Israeli forces.

Given the deep-rooted political divisions, competing regional agendas, and unresolved demands from minority groups, the unrest in southern Syria is unlikely to end soon.

Despite another temporary ceasefire, underlying tensions remain. Further clashes are not only possible but highly probable.

The Conversation

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

ref. Why is Israel bombing Syria? – https://theconversation.com/why-is-israel-bombing-syria-261259

Muhammadu Buhari: Nigeria’s military leader turned democratic president leaves a mixed legacy

Source: The Conversation – Global Perspectives – By Kester Onor, Senior Research Fellow, Nigerian Institute of International Affairs

Nigeria’s former president, Muhammadu Buhari, who died in London on 13 July aged 82, was one of two former military heads of state who were later elected as civilian presidents. Buhari was the military head of state of Nigeria from 31 December 1983 to 27 August 1985 and president from 2015 to 2023.

The other Nigerian politician to have been in both roles is former president Olusegun Obasanjo . He was a military ruler between 1976 and 1979 and elected president between 1999 and 2007.

Buhari led Nigeria cumulatively for nearly a decade. His time as military head of state was marked with a war against corruption but he couldn’t do as much during his time as president under democratic rule.

As a political scientist who once served in the Nigerian Army, I believe that former president Buhari’s government’s war on terrorism was largely underwhelming, despite promises and early gains.

In his elected role, Buhari maintained a modest personal lifestyle and upheld electoral transitions. Nevertheless his presidency was marred by economic mismanagement, a failure to implement bold structural reforms, ethnic favouritism, and an unfulfilled promise of change.

He did leave tangible infrastructural footprints, a focus on agriculture, and foundational efforts in transparency and anti-corruption.

So his mark on Nigeria’s development trajectory was mixed.

Early years

Buhari was born on 17 December 1942, to Adamu and Zulaiha Buhari in Daura, Katsina State, north-west Nigeria. He was four years old when his father died. He attended Quranic school in Katsina. He was a Fulani, one of the major ethnic nationalities in Nigeria.

After completing his schooling, Buhari joined the army in 1961. He had military training in the UK, India and the United States as well as Nigeria.

In 1975 he was appointed military governor of North Eastern State (now Borno State), after being involved in ousting Yakubu Gowon in a coup that same year. He served as governor for a year.

Buhari later became federal commissioner for petroleum resources, overseeing Nigeria’s petroleum industry under Obasanjo. Obasanjo had become head of state in 1976 when Gowon’s successor, Murtala Muhammed, was assassinated in a failed coup that year.

In September 1979, he returned to regular army duties and commanded the 3rd Armoured division based in Jos, Plateau State, north central. Nigeria’s Second Republic commenced that year after the election of Shehu Shagari as president.

The coup that truncated the Shagari government on 31 December 1983 saw the emergence of Buhari as Nigeria’s head of state.

Buhari’s junta years

Buhari headed the military government for just under two years. He was ousted in another coup on 27 August 1985.

While at the helm he vowed that the government would not tolerate kick-backs, inflation of contracts and over-invoicing of imports. Nor would it condone forgery, fraud, embezzlement, misuse and abuse of office and illegal dealings in foreign exchange and smuggling.

Eighteen state governors were tried by military tribunals. Some of the accused received lengthy prison sentences, while others were acquitted or had their sentences commuted.

His government also enacted the notorious Decree 4 under which two journalists, Nduka Irabor and Dele Thompson, were jailed. The charges stemmed from three articles published on the reorganisation of Nigeria’s diplomatic service.

Buhari also instituted austerity measures and started a “War Against Indiscipline” which sought to promote positive values in the country. Authoritarian methods were sometimes used in its implementation. Soldiers forced Nigerians to queue, to be punctual and to obey traffic laws.

He also instituted restrictions on press and political freedoms. Labour unions were not spared either. Mass retrenchment of Nigerians in the public service was carried out with impunity.

While citizens initially welcomed some of these measures, growing discontent on the economic front made things tougher for the regime.




Read more:
Why Buhari won even though he had little to show for first term


Buhari, the democrat

Buhari’s dream to lead Nigeria again through the ballot box failed in 2003, 2007 and 2011. To his credit, he didn’t give up. An alliance of opposition parties succeeded in getting him elected in 2015.

The legacy he left is mixed.

Buhari’s government deepened national disunity.

His appointments, often skewed in favour of the northern region and his Fulani kinsmen, fuelled accusations of tribalism and marginalisation. His perceived affinity with Fulani herdsmen, despite widespread violence linked to some of them, further eroded public trust in his leadership.

His anti-corruption mantra largely did not succeed. While some high-profile recoveries were made, critics argue that his anti-corruption war was selective and heavily politicised.

Currently, his Central Bank governor is on trial for corruption charges.

The performance of the economy was also dismal under his tenure. Not all these problems could be laid at his feet. Nevertheless his inability to tackle the country’s underlying problems, such as insecurity, inflation and rising unemployment, all contributed. He presided over two recessions, rising unemployment, inflation, and a weakened naira.

He did, however, succeed on some fronts.

He tried with infrastructure. The Lagos-Ibadan expressway, a major road, was almost completed and he got the railways working again, completing the Abuja-Kaduna and Lagos-Ibadan lines. He also completed the Second Niger Bridge.

There was an airport revitalisation programme which led to improvements in Lagos, Abuja and Port Harcourt airports.

Buhari signed the Petroleum Industry Act after nearly 20 years’ delay. This is now attracting more investments into the oil industry.

He also initiated some social investment schemes like N-Power, N-Teach and a school feeding programme. They provided temporary jobs for some and gave some poor people more money in their pockets. N-Power is a youth empowerment programme designed to combat unemployment, improve social development and provide people with relevant skills.

These programmes later became mired in corruption which only became known after he left office.

There was also an Anchor Borrowers Scheme to make the country more sufficient in rice production. Again, it got enmeshed in corruption and some of its officials are currently standing trial.

In the fight against corruption, the Buhari administration made some progress through the Treasury Single Account, which improved financial transparency in public institutions. The Whistle Blower Policy also led to the recovery of looted funds.




Read more:
Why Buhari’s government is losing the anti-corruption war


Security failures

Buhari oversaw a deterioration of Nigeria’s security landscape. Banditry, farmer-herder clashes, kidnapping and separatist agitations escalated.

In 2015 Buhari campaigned on a promise to defeat Boko Haram and restore territorial integrity in the north-east. Initially, his administration made some progress. Boko Haram was driven out of several local government areas it once controlled, and major military operations such as Operation Lafiya Dole were launched to reclaim territory.

However, these initial successes were not sustained. Boko Haram splintered, giving rise to more brutal factions like the Islamic State West Africa Province. This group continued to launch deadly attacks.

Buhari’s counter-terrorism strategy was often reactive, lacking a clear long-term doctrine. The military was overstretched and under-equipped. Morale issues and allegations of corruption in the defence sector undermined operations.

Intelligence coordination remained poor, while civil-military relations suffered due to frequent human rights abuses by security forces. Community trust in the government’s ability to provide security dwindled.

Buhari’s second coming as Nigeria’s leader carried high expectations, but he under-delivered.

The Conversation

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

ref. Muhammadu Buhari: Nigeria’s military leader turned democratic president leaves a mixed legacy – https://theconversation.com/muhammadu-buhari-nigerias-military-leader-turned-democratic-president-leaves-a-mixed-legacy-261079

Sudan’s war is an economic disaster: here’s how bad it could get

Source: The Conversation – Africa (2) – By Khalid Siddig, Senior Research Fellow and Program Leader for the Sudan Strategy Support Program, International Food Policy Research Institute (IFPRI)

Since April 2023, Sudan has been engulfed in a devastating war between the Sudanese Armed Forces and the Rapid Support Forces. What began as a struggle for power has turned into a national catastrophe. More than 14 million people have been displaced. Health and education systems have collapsed and food insecurity threatens over half the population of about 50 million.

The war has disrupted key sectors, triggering severe economic contractions, and worsening poverty and unemployment levels.

Sudan’s finance minister reported in November 2023 that the war had resulted in economic losses exceeding US$26 billion – or more than half the value of the country’s economy a year earlier. The industrial sector, which includes manufacturing and oil refining, has lost over 50% of its value. Employment has fallen by 4.6 million jobs over the period of the conflict. More than 7 million more people have been pushed into poverty. The agrifood system alone has shrunk by 33.6%. These estimates exclude informal economy losses.

My research applies economy-wide models to understand how conflict affects national development. In a recent study, my colleagues and I used this approach to answer the question: what will happen to Sudan’s economy and poverty levels if the war continues through 2025?

To assess the economic impact of the conflict, we used a Social Accounting Matrix multiplier model. This is a tool that captures how shocks affect different sectors and other agents of the economy, such as firms, government and households.

Based on our modelling, the answer is devastating: the conflict could shrink the size of Sudan’s economy by over 40% from 2022 levels, plunging millions more into poverty.

We modelled two scenarios to capture the potential trajectories of Sudan’s economy.

The extreme scenario assumes a sharp initial collapse, with a 29.5% contraction in the size of the economy in 2023 and 12.2% in 2024, followed by a 7% decline in 2025, reflecting some stabilisation over time.

The moderate scenario, based on World Bank projections, applies a 20.1% contraction in 2023 and a 15.1% drop in 2024, also followed by a 7% reduction in 2025, indicating a slower but more prolonged deterioration.

We estimated the annual figures and report only the aggregate impacts through 2025 for clarity.

We found that if the conflict endures, the value of Sudan’s economy will contract by up to 42% from US$56.3 billion in 2022 (pre-conflict) to US$32.4 billion by the end of 2025. The backbone of livelihoods – agriculture – will be crippled. And the social fabric of the country will continue to fray.

How we did it

Our Social Accounting Matrix multiplier model used data from various national and international sources to show the impact of conflict on the value of the economy, its sectors and household welfare.

We connected this to government and World Bank data to reflect Sudan’s current conditions.

This allowed us to simulate how conflict-driven disruptions affect the value of the economy, its sectors and household welfare.

What we found

Under the extreme scenario, we found:

  • Gross domestic product collapse: Gross domestic product (GDP) measures the total value of all goods and services produced in a country within a year. It’s a key indicator of economic health. We found that the value of Sudan’s economy could contract by up to 42%. This means the country would be producing less than 60% of what it did before the conflict. This would affect incomes, jobs, government revenues and public services. The industrial sector – heavily concentrated in Khartoum – would be hardest hit, with output shrinking by over 50%. The value of services like education, health, transport and trade would fall by 40%, and agriculture by more than 35%.

  • Job losses: nearly 4.6 million jobs – about half of all employment – could disappear. Urban areas and non-farm sectors would be worst affected, with over 700,000 farming jobs at risk.

  • Incomes plummet: household incomes would decline across all groups – rich and poor, rural and urban – by up to 42%. Rural and less-educated households suffer the most.

  • Poverty spikes: up to 7.5 million more people could fall into poverty, adding to the 61.1% poverty level in 2022. In rural areas, the poverty rate could jump by 32.5 percentage points from the already high rural poverty rate pre-conflict (67.6% of the rural population). Women, especially in rural communities, are hit particularly hard. Urban poverty, which was at 48.8% pre-conflict, increases by 11.6 percentage points.

  • The agrifood system – which includes farming, food processing, trade and food services – would lose a third of its value under the extreme scenario.

Why these findings matter

Sudan was already in a fragile state before the war. It was reeling from decades of underinvestment, international sanctions and institutional breakdown.

The war has reversed hard-won gains in poverty reduction. It is also dismantling key productive sectors – from agriculture to manufacturing – which will be essential for recovery once the conflict ends. Every month of continued fighting adds to the damage and raises the cost of rebuilding.

Our projections already show major economic collapse, yet they don’t include the full extent of the damage. This includes losses in the informal economy or the strain on household coping strategies. The real situation could be even worse than what the data suggests.

What needs to be done

First and foremost, peace is essential. Without an end to the fighting, recovery will be impossible.

Second, even as conflict continues, urgent action is needed to stabilise livelihoods. This means:

  • supporting agriculture in areas that remain relatively safe. Food production must be sustained to prevent famine.

  • restoring critical services where possible – particularly transport, trade and retail – to keep local economies functioning

  • protecting the most vulnerable, such as women in rural areas and the elderly, through expanded social protection and targeted cash assistance.

Third, prepare for recovery. The international community – donors, development banks and NGOs – must begin laying the groundwork for post-conflict reconstruction now. This includes investment in public infrastructure, rebuilding institutions and re-integrating displaced populations.

The bottom line

Sudan’s war is more than a political crisis. It is an economic catastrophe unfolding in real time. One that is deepening poverty, destroying livelihoods and erasing years of progress.

Our research provides hard numbers to describe what Sudanese families are already experiencing every day.

The country’s economy is bleeding. Without a shift in the trajectory of the conflict, recovery could take decades – if it happens at all.

The Conversation

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

ref. Sudan’s war is an economic disaster: here’s how bad it could get – https://theconversation.com/sudans-war-is-an-economic-disaster-heres-how-bad-it-could-get-260609

‘Alligator Alcatraz’ showcases Donald Trump’s penchant for visual cruelty

Source: The Conversation – Canada – By Marycarmen Lara Villanueva, PhD Candidate, Department of Social Justice Education, Ontario Institute for Studies in Education, University of Toronto

The United States government recently announced the opening of a massive immigrant detention facility built deep within the Florida Everglades that’s been dubbed “Alligator Alcatraz.” White House Press Secretary Karoline Leavitt said during a media briefing that “there is only one road leading in … and the only way out is a one-way flight.”

For some taking in her remarks, the moment felt dystopian. According to Florida Gov. Ron DeSantis, the facility is surrounded by swamps and alligators and is equipped with more than 200 security cameras, 8,500 metres of barbed wire and a security force of 400 personnel.

Accounts from some of the first detainees at the facility have shed light on the inhumane conditions. They’ve described limited access to water and fresh air, saying they received only one meal a day and that the lights are on 24/7.

Apparently designed to be an immigration deterrence and a display of cruelty, Alligator Alcatraz is much more than infrastructure. It is visual policy aimed to stage terror as a message while making Trump’s authoritarian and fascist politics a material reality.

Contributing to this fascist visual apparatus, AI-generated images of alligators wearing Immigration and Customs Enforcement (ICE) hats have circulated widely on social media. Some have questioned whether these images were satire or state propaganda.

An AI-generated image shows alligators wearing ICE caps outside a heavily fortified facility with barbed wire fences and a watch tower.
A screenshot of a June 2025 Homeland Security post on X, formerly Twitter.

Surveillance, migration, debilitation

In a moment of growing right-wing rhetoric and support for anti-immigrant violence, understanding how visual regimes operate, and what they attempt to normalize, is important.




Read more:
Nearly 54% of extreme conservatives say the federal government should use violence to stop illegal immigration


Surveillance and deterrence technologies used along the U.S.–Mexico border for decades were intentionally designed to restrict the movement of undocumented migrants. According to Human Rights Watch, this has resulted in more than 10,000 deaths.

Since 1994, U.S. Border Patrol has been accused of directing migrants away from urban crossings along the southern border, intentionally funnelling them into harsh and inhospitable terrain like the Sonora Desert.

The desert serves as a deterrent to prevent immigrants from reaching their destiny. American theorist Jasbir Puar’s concept of debility is useful in making sense of the strategic process whereby the state works not to kill, but to weaken, as a form of slow violence that wears people down over time. The desired outcome is deterrence.

On the southern U.S. border, severe dehydration and kidney failure can be outcomes of this debilitating process, potentially resulting in disability or death.

Infrastructures of violence

Sarah Lopez, a built environment historian and migration scholar in the U.S., describes the architecture of migrant immobilization as existing on a continuum with prison design. She’s highlighted the increasingly punitive conditions of immigration detention facilities, such as small dark cells or the absence of natural light.

French architect and writer Léopold Lambert explains that architecture isn’t just about buildings, but about how space is used to organize and control people. He coined and developed the term weaponized architecture to describe how spaces are designed to serve the political goals of those in power.

Colonialism, capitalism and modernity are closely connected, and architecture has played a key role in making them possible. Alligator Alcatraz sits at the intersection of all three, intentionally created to invoke danger and isolation. In other words, it’s cruel by design.

As Leavitt put it, the facility is “isolated and surrounded by dangerous wildlife and unforgiving terrain.” The Trump administration has essentially transformed land into infrastructure and migrants into disposable threats.

Terrorizing the marginalized

State-sanctioned “unforgiving terrains” are not new, and the use of alligators to terrorize people of colour isn’t new either.

The grotesque history of Black children being used as “alligator bait” in Jim Crow-era imagery is well-documented.

So when Trump publicly fantasized about alligators eating immigrants trying to escape the new detention centre, it came as no surprise to those familiar with the long racist visual history linking alligators to representations of Black people.

This logic is redeployed in the form of a racial terror that is made visible, marketable and even humorous in mainstream political discourse.

Visuality and migration

“Visuality” is a key term in the field of visual and cultural studies, originally coined by Scottish historian Thomas Carlyle and reintroduced in the early 2000s by American cultural theorist Nicholas Mirzoeff. It can be understood as the socially, historically and culturally constructed ways of seeing and understanding the visual world.

Visual systems have historically been used to justify western imperial and colonial rule by controlling how people see and understand the world.

While Alligator Alcatraz is a brand-new detention facility, it draws from a longer visual and spatial history of domination.

The AI-generated images of alligators wearing ICE hats can be seen as part of a broader visual system that makes racialized violence seem normal, justified and even funny. In this absurd transformation, the alligator is reimagined as a legitimate symbol of border enforcement.

Migrant death by water

The spectacle of Alligator Alcatraz, with its swampy inhospitable landscape, cannot be divorced from the long visual history of migrant death by water that’s relied on the circulation of images to provoke outrage — and sometimes state action.

Examples include the iconic image of Aylan Kurdi, the Syrian child whose lifeless body washed ashore in Turkey in 2015, and the devastating photo of Oscar Alberto Martínez Ramírez and his two-year-old daughter who both drowned crossing the Rio Grande in 2019.

These images sparked global concern, but they also reinforced the idea that migrant lives only matter when they end in death — as if borders only become visible when they cause deaths.

Alligator Alcatraz was built in eight days. The fact that a detention camp — or what some have called a concentration camp — can be assembled almost overnight, while basic human needs like clean drinking water or emergency warning systems go unmet for years, speaks volumes about where political will and government priorities lie.

The Conversation

Marycarmen Lara Villanueva does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. ‘Alligator Alcatraz’ showcases Donald Trump’s penchant for visual cruelty – https://theconversation.com/alligator-alcatraz-showcases-donald-trumps-penchant-for-visual-cruelty-260566

How rising living costs are changing the way we date, live and love

Source: The Conversation – Canada – By Melise Panetta, Lecturer of Marketing in the Lazaridis School of Business and Economics, Wilfrid Laurier University

Young adults in their 20s and 30s face an altered social landscape where financial realities influence their relationships. (Rene Ranisch/Unsplash)

If it feels like rising prices are affecting your dating life or friendships, you’re not imagining it. Around the world, economic pressures are taking a significant toll on personal relationships.

From strained romantic partnerships to postponed life milestones, financial uncertainty is changing the way people connect and relate to with one another.

Young adults in their 20s and 30s, in particular, are facing an altered social landscape where even the most fundamental aspects of relationships are being influenced by financial realities.


Dating today can feel like a mix of endless swipes, red flags and shifting expectations. From decoding mixed signals to balancing independence with intimacy, relationships in your 20s and 30s come with unique challenges. Love IRL is the latest series from Quarter Life that explores it all.

These research-backed articles break down the complexities of modern love to help you build meaningful connections, no matter your relationship status.


Financial stress and relationship strain

Money has long been one of the biggest sources of conflict in relationships, but today’s economic landscape has made financial stress an even greater burden.

In Canada, a staggering 77 per cent of couples report financial strain, and 62 per cent say they argue over money. The rising cost of rent, food and everyday expenses has forced many couples to make difficult financial decisions, sometimes at the expense of their relationship.

These concerns are not unique to Canadian couples. A study in the United Kingdom found that 38 per cent of people in a relationship admit to having a secret account or “money stashed away” that their partner doesn’t know about. And in the United States, couples surveyed reported having 58 money-related arguments per year.

A woman sits on a couch with her head in her hands while another person, only seen from the neck down, sits beside her with their arms crossed
Money has long been one of the biggest sources of conflict in relationships.
(Shutterstock)

Even more concerning, financial instability is affecting how long relationships last. A recent RBC poll found 55 per cent of Canadians feel they need to be in a relationship to afford their lifestyle.

The economic barriers to independence are particularly pronounced for those contemplating separation or divorce. Traditionally, a breakup meant one partner moving out, but now more divorced and separated couples are finding themselves cohabitating simply because they can’t afford to live alone.

Understanding how to maintain a healthy relationship when facing financial troubles is essential for couples to navigate these difficult times.

Postponing major life decisions

The cost-of-living crisis is also delaying key life milestones for young adults worldwide. A Statistics Canada survey found that 38 per cent of young adults have postponed moving out due to economic uncertainty, an increase from 32 per cent in 2018.

This issue is not only delaying the journey to independent adulthood, it is also reversing it. For example, in the United Kingdom, one in five young adults who moved out have had to move back into their family home due to the cost of living crisis.

Housing affordability plays a major role in these delays. With housing prices soaring in Canada, the U.S., the U.K. and elsewhere, home ownership feels out of reach for many. For instance, 55 per cent of young Canadians report the housing crisis is fuelling their decision to delay starting a family.

Several real estate for sale signs seen on a lawn
The cost-of-living crisis is also delaying key life milestones for young adults worldwide. Real estate signs seen in Calgary in May 2023.
(Shutterstock)

These delays have cascading effects on individuals and on broader societal trends, including lower fertility rates and shifts toward smaller families.

Dating in a cost-conscious era

One side effect of the rising cost of living is that couples are moving in together sooner than they might have otherwise in order to split living expenses. Others are adopting a more pragmatic approach to dating and bringing up topics like financial stability, job security and housing much earlier in their relationships.

A dating trend known as “future-proofing” is also spreading. According to Bumble’s annual trend report, 95 per cent of singles say their worries about the future are impacting who they date and how they approach relationships. Top concerns include finances, job security, housing and climate change.




Read more:
The price of love: Why millennials and Gen Zs are running up major dating debt


At the same time, financial strain is leading to simpler and cheaper date nights. More than half of Canadians say the rising cost of living is affecting dating. Many people are opting for budget-friendly activities like coffee dates, picnics or home-cooked meals instead of expensive dinners or weekend getaways.

In the U.K., inflation and other day-to-day expenses have also made 33 per cent of the nation’s young singles less likely to go on dates. Around one-quarter of them say it has made them less likely to seek out a romantic partner altogether.

Two people knock their glasses of red wine together over a candlelit table
Financial strain is leading fewer people to go on expensive, extravagent date nights.
(Shutterstock)

These costs are forcing single Americans to adjust their dating plans. With 44 per cent of single Americans reporting adjusting a date for financial reasons, and 27 per cent outright cancelling plans due to financial pressures, it is clear that the cost of living is fundamentally changing how Americans date.

Also, with 38 per cent of dating Canadians saying the costs associated with dating have negatively impacted their ability to reach their financial goals, some are even skipping dating altogether.

The cost of friendship

Friendships, too, are feeling the pinch. Gone are the days of casually grabbing dinner or catching a concert on the weekend. Nearly 40 per cent of Canadians, 42 per cent of Britons and 37 per cent of Americans have cut back on social outings due to financial constraints.

While this may seem like a small sacrifice, the decline in social interactions carries serious consequences. Regular social engagement is critical for mental health, resilience and career development. The more social activities are reduced, the greater the risk of loneliness and isolation — two factors that can significantly impact emotional well-being.

For many, socializing now means opting for budget-friendly alternatives. However, even with creative adjustments, financial pressures are making it harder to maintain strong social ties.

The changing landscape of connection

If you’re in your 20s or 30s, you’ve probably felt the way the economic realities of today are reshaping what relationships look like. Rising costs are influencing everything, from who you live with, how you date and when — or if — you take major life steps.

Maybe you’ve moved in with a partner sooner than planned to split rent, swapped nights out for budget-friendly hangs or put off milestones like starting a family. You’re not alone. Financial pressures are redefining how we connect with each other.

Finding ways to maintain strong relationships under economic stress is essential. Research shows providing emotional support to your partner, employing positive problem-solving skills and engaging in open communication are key maintaining high-quality relationships.

The Conversation

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

ref. How rising living costs are changing the way we date, live and love – https://theconversation.com/how-rising-living-costs-are-changing-the-way-we-date-live-and-love-252709

Biology is complex and diverse, so scientific research approaches need to be too

Source: The Conversation – Canada – By Thomas Merritt, Professor, Chemistry and Biochemistry, Laurentian University

The beautiful, fascinating and often perplexing world around us grows from intricate and convoluted interactions of millions of pieces. As scientists, we work to understand and describe the parts and interactions of these systems.

Scientific understanding is only as good as the questions we ask. Observing the world from a variety of viewpoints and asking questions from a diversity of perspectives helps us recognize and understand biological complexity. Science, and our own experience, tells us that diverse collaborations lead to better questions and more innovative solutions — but diversity in research is under threat.

A major advancement in modern biology, specifically in the world of modern genetics that our research team works in, has been the realization that genes are far more complicated than we thought 20 years ago. When the human genome was first sequenced in 2001, scientists realized that each person’s DNA contained around 20,000 genes. Earlier estimates had been between 80,000 and 100,000.

This drastic downsize may seem like a step back in complexity, but the reduced number means genes must be more complex in order to fulfil multiple roles and functions. There are fewer genes, but each gene has a complicated set of multiple functions modulated through intricate, interconnected and interactive gene-regulation mechanisms.

Model species, surprising discoveries

Our research group studies gene regulation using the fruit fly (Drosophila melanogaster) as a model species — a non-human species studied extensively to reveal more about other organisms. Flies, like humans, have two copies of each chromosome, each copy with a full set of genes. Typically, regulation of each copy has been assumed to be independent.

a close up of a fruit fly
Flies, like humans, have two copies of each chromosome.
(Mr.checker/Wikimedia)

Unexpectedly, our research has found that in fruit flies, the copies on separate chromosomes physically interact to modulate each other’s regulation. This means that the chromosomes aren’t independent: they co-regulate in a way that depends on genome structure, or what we call chromosome architecture.

This form of inter-chromosomal gene regulation, called transvection, was originally described in the 1950s, but is largely unknown. Its potential role to drive biological complexity is underappreciated because its effects are often (but not always) subtle and generally overshadowed by “typical” mechanisms of gene regulation along a single chromosome, cis-regulation.




Read more:
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Complex genetic interactions

Our transvection research focuses on subtle differences between individuals and environments. Too often, biology assumes that phenomena are simple, uniform and discreet.

A classic example, taught in high school biology classes, demonstrates this thinking. Austrian biologist Gregor Mendel studied genetics in pea plants to propose dominant and recessive hereditary traits. His data was a little too clean, too good to be true: Mendel’s peas were either wrinkled or round, yellow or green.

Genetics is works in more complex ways: think of eye colour. Our eyes are not a dichotomous brown or blue. Colour varies in a spectrum of shades of blues, greens, grays, hazels and browns.

Similarly, we have shown that transvection, itself an unexpected twist, varies subtly and substantially, in unexpected ways. Recognizing that inter-chomosomal regulation was even possible, let alone could itself be modulated and variable, meant looking at our results from a non-typical view point, a different perspective.

Our research into stress biology has drawn similar conclusions; diverse responses are the norm and appreciating this variability is absolutely fundamental to understanding the system.

Differences between male and female biologies

In our research into metabolism, we have repeatedly found significant and substantial differences between male and females. For example, in recent unpublished data, we find that differences between male and female fruit fly responses to metal toxicity were as large as we would have expected to occur between different species.

Past conventional wisdom in the field assumed that the biology in the two sexes was interchangeable, with females essentially being just hypervariable males, although recent research in our lab and others is broadly pushing back against this misconception.




Read more:
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The male and female responses are similar but distinct, and this is an important point. To understand biology, our research indicates, we need to identify, appreciate and study these subtle differences in order to produce more thorough scientific investigations.

Unexpected complexity

Our research regularly reveals unexpected biological complexity and, not coincidentally, the studies listed above were all collaborations. The technical complexity of research often requires involving experts in multiple disciplines.

A typical project can involve half a dozen or more experiments and methods, ranging from biochemistry to genetics to life history, and techniques from enzyme kinetic assays to mass spectrometry and DNA sequencing.

We are part of a genetics research group at Laurentian University whose diversity has greatly strengthened the quality and originality of contributions we have made to the field. In our experience, diverse collaborations combining different perspectives and viewpoints lead to innovative conclusions.

The literature bears this out: a series of large-scale studies involving millions of researchers and publications repeatedly show that diverse groups of scientists ask more interesting, perceptive and innovative questions and pose more interesting solutions.

Diversity and innovation

But this diversity-innovation connection is under attack in the current social and political climate. This has been most visible under the current political regime in the United States, but is also present here in Canada.

If successful, these attacks will narrow the perspective of scientific research and cripple scientific advances. Current diversity is the result of decades of programs fighting generations of systematic discrimination. Many researchers have been making research a more diverse and inclusive place.




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Sustainability is essential to the long-term health of scientific research. The research, and our own experiences, clearly shows that diverse groups of researchers conduct more creative, innovative and impactful science. Visibility in scientific research is important to ensure its sustainability. More young students will pursue careers in research if they can see themselves in that role.

Our hope is that a broader appreciation of the importance of diversity in research, will lead to greater community and political, support for research programs that recognize the fundamental importance of diversity, equity and inclusion.

The biological world is a beautifully diverse and complex place. To truly understand that world, the research laboratory must to be, too.

The Conversation

Thomas Merritt receives funding from the Natural Sciences and Engineering Research Council.

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

ref. Biology is complex and diverse, so scientific research approaches need to be too – https://theconversation.com/biology-is-complex-and-diverse-so-scientific-research-approaches-need-to-be-too-260696

Examining mushrooms under microscopes can help engineers design stronger materials

Source: The Conversation – USA – By Mohamed Khalil Elhachimi, PhD Student in Mechanical Engineering, Binghamton University, State University of New York

White button mushrooms are one of the types studied to inform stronger materials. DigiPub/Moment via Getty Images

Pick up a button mushroom from the supermarket and it squishes easily between your fingers. Snap a woody bracket mushroom off a tree trunk and you’ll struggle to break it. Both extremes grow from the same microscopic building blocks: hyphae – hair-thin tubes made mostly of the natural polymer chitin, a tough compound also found in crab shells.

As those tubes branch and weave, they form a lightweight but surprisingly strong network called mycelium. Engineers are beginning to investigate this network for use in eco-friendly materials.

A diagram showing a mushroom with hyphae filaments labeled, as well as the mycelium filaments underground.
Filaments called hyphae are a mushroom’s support structures both above and below ground, and the mycelium network links multiple mushrooms together.
Milkwood.net/Flickr, CC BY-NC-SA

Yet even within a single mushroom family, the strength of a mycelium network can vary widely. Scientists have long suspected that how the hyphae are arranged – not just what they’re made of – holds the key to understanding, and ultimately controlling, their strength. But until recently, measurements that directly link microscopic arrangement to macroscopic strength have been scarce.

I’m a mechanical engineering Ph.D. student at Binghamton University who studies bio-inspired structures. In our latest research, my colleagues and I asked a simple question: Can we tune the strength of a mushroomlike material just by changing the angle of its filaments, without adding any tougher ingredients? The answer, it turns out, is yes.

2 edible species, many tiny tests

In our study, my team compared two familiar fungi. The first was the white button mushroom, whose tissue uses only thin filaments called generative filaments. The second was the maitake, also called hen-of-the-woods, whose tissue mixes in a second, thicker type of hyphae called skeletal filaments. These skeletal filaments are arranged roughly in parallel, like bundles of cables.

A diagram showing two electron microscope images of long, thin filaments. On the right, the filaments are arranged in parallel.
The two types of mushrooms used in the study: The white button mushroom is monomitic, shown on the left, meaning it has only one type of hyphae. The maitake is shown on the right, and is dimitic, meaning it has two types of hyphae.
Mohamed Khalil Elhachimi

After gently drying the caps and stems to remove any water, which can soften the material and skew the results, we zoomed in with scanning electron microscopes and tested the samples at two very different scales.

First, we tested macro-scale compression. A motor-driven piston slowly squashed each mushroom while sensors recorded how hard the sample pushed back – the same way you might squeeze a marshmallow, only with laboratory precision.

Then we pressed a diamond tip thinner than a human hair into individual filaments to measure their stiffness.

The white mushroom filaments behaved like rubber bands, averaging about 18 megapascals in stiffness – similar to natural rubber. The thicker skeletal filaments in maitake measured around 560 megapascals, more than 30 times stiffer and approaching the stiffness of high-density polyethylene – the rigid plastic used in cutting boards and some water pipes.

Two mushroom photos, the left is a bracket mushroom with many leaflike structures attached together, the right is button mushrooms which are spherical caps with conical stems.
The two mushrooms tested include the maitake, left, and the button mushroom.
Lance Cheung/USDA and edenpictures/Flickr, CC BY

But chemistry is only half the story. When we squeezed entire chunks, the direction we squeezed in mattered even more for the maitake. Pressing in line with its parallel skeletal filaments made the block 30 times stiffer than pressing across the grain. By contrast, the tangled filaments in white mushrooms felt equally soft from every angle.

A digital mushroom and twisting the threads

To separate geometry from chemistry, we converted snapshots from the microscope into a computer model using a 3D Voronoi network – a pattern that mimics the walls between bubbles in a foam. Think of ping-pong balls crammed in a box: Each ball is a cell, and the walls between cells become our simulated filaments.

We assigned those filaments by the stiffness values measured in the lab, then virtually rotated the whole network to angles of 0 degrees, 30 degrees, 60 degrees, 90 degrees and completely random.

Horizontal (0 degrees) filaments flexed like a spring mattress. Vertical (90 degrees) filaments supported weight almost as firmly as dense wood. Simply tilting the network to 60 degrees nearly doubled its stiffness compared with 0 degrees – all without changing a single chemical ingredient.

A diagram showing five arrangements of fibers, where the fibers are tilted different degrees.
The researchers modeled structures with different fiber orientations to see which are the strongest: (a) represents a horizontal fiber orientation, (b) a 30-degree fiber orientation, (c) a 60-degree fiber orientation, (d) a vertical fiber orientation, and (e) a random fiber orientation.
Mohamed Khalil Elhachimi

Basically, we found that orientation alone could turn a mushy sponge into something that stands up to serious pressure. That suggests manufacturers could make strong, lightweight, biodegradable parts – such as shoe insoles, protective packaging and even interior panels for cars – simply by guiding how a fungus grows rather than by mixing in harder additives.

Greener materials – and beyond

Startups already grow “leather” made from mycelium – the threadlike fungal network – for handbags, and mycelium foam as a Styrofoam replacement.

Guiding fungi to lay their filaments in strategic directions could push performance much higher, opening doors in sectors where strength-to-weight ratio is king: think sporting goods cores, building-insulation panels or lightweight fillers inside aircraft panels.

The same digital tool kit also works for metal or polymer lattices printed layer by layer. Swap the filament properties in the model, let the algorithm pick the best angles, and then feed that layout into a 3D printer.

One day, engineers might dial up an app that says something like, “I need a panel that’s stiff north-south but flexible east-west,” and the program could spit out a filament map inspired by the humble maitake.

Our next step is to feed thousands of these virtual networks into a machine learning model so it can predict – or even invent – filament layouts that hit a targeted stiffness in any direction.

Meanwhile, biologists are exploring low-energy ways to coax real fungi to grow in neat rows, from steering nutrients toward one side of a petri dish to applying gentle electric fields that encourage filaments to align.

This study taught us that you don’t always need exotic chemistry to make a better material. Sometimes it’s all about how you line up the same old threads – just ask a mushroom.

The Conversation

Mohamed Khalil Elhachimi 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. Examining mushrooms under microscopes can help engineers design stronger materials – https://theconversation.com/examining-mushrooms-under-microscopes-can-help-engineers-design-stronger-materials-260477