Adaptation au changement climatique en Afrique pendant 10 000 ans : une étude offre des enseignements pour notre époque

Source: The Conversation – in French – By Leanne N. Phelps, Associate research scientist, Columbia University

Un éleveur guide son troupeau de bœufs à travers les paysages du sud-ouest nigérian. Leanne Phelps, Fourni par l’auteur

Imaginez que vous vivez dans un endroit où une seule sécheresse, un seul ouragan ou une seule coulée de boue peut anéantir votre approvisionnement alimentaire. C’est exactement le cas de nombreuses communautés à travers l’Afrique, qui doivent faire face à des chocs climatiques tels que des inondations, des vagues de chaleur et à de mauvaises récoltes.

Les politiques de développement visant à lutter contre ces menaces négligent souvent une source d’information précieuse : l’histoire même de l’Afrique.

Il y a environ 14 700 à 5 500 ans, une grande partie de l’Afrique a connu des conditions plus humides, une période appelée « période humide africaine ». Puis, vers 5 500 ans (avant notre ère), le climat est devenu plus sec. Cela a entraîné de grands changements sociaux, culturels et environnementaux sur le continent.

Nous faisons partie d’une équipe de chercheurs en sciences sociales, naturelles et environnementales. Nous avons récemment publié une étude sur la façon dont les communautés africaines ont réagi aux changements climatiques au cours des 10 000 dernières années. C’est la première recherche à utiliser des données isotopiques pour retracer l’évolution des modes de vie sur l’ensemble du continent africain.

Cette approche à l’échelle du continent offre un nouvel éclairage sur la formation et l’évolution des moyens de subsistance dans l’espace et dans le temps.

Les théories précédentes partaient souvent du principe que les sociétés et leurs systèmes alimentaires évoluaient de manière linéaire. En d’autres termes, elles passaient de communautés de chasseurs-cueilleurs à des sociétés socialement et politiquement complexes pratiquant l’agriculture.

Mais notre étude montre une réalité plus riche. Pendant 10 000 ans, les communautés africaines se sont adaptées en combinant l’élevage, l’agriculture, la pêche et la cueillette. Elles ont mélangé différentes pratiques en fonction de ce qui fonctionnait à différents moments dans leur environnement spécifique. Cette diversité entre les communautés et les régions a été essentielle à la survie de l’humanité.

Cela nous enseigne des leçons concrètes pour repenser les systèmes alimentaires actuels.

Notre recherche montre que les politiques rigides venues d’en haut ont peu de chances de réussir. C’est notamment le cas des programmes qui misent tout sur l’agriculture intensive au détriment de la diversification des économies. Bon nombre de politiques actuelles adoptent une vision étroite, en privilégiant uniquement les cultures commerciales.

L’histoire nous apprend autre chose : pour être résilient face aux chocs, il ne faut pas tout miser sur une seule méthode. Il faut rester souple, combiner plusieurs approches et s’adapter aux réalités locales.

Les indices laissés par le passé

Nous avons pu tirer nos conclusions en examinant les indices laissés par l’alimentation des populations et leur environnement. Pour ce faire, nous avons analysé les traces chimiques (isotopes) présentes dans les ossements humains et animaux domestiques anciens provenant de 187 sites archéologiques à travers le continent africain.

Nous avons classé les résultats en groupes présentant des caractéristiques similaires, ou « niches isotopiques ». Nous avons ensuite décrit les moyens de subsistance et les caractéristiques écologiques de ces niches à l’aide d’informations archéologiques et environnementales.

Nos analyses ont révélé une grande diversité de systèmes de subsistance.
Par exemple, dans les régions correspondant aujourd’hui au Botswana et au Zimbabwe, certains groupes combinaient l’agriculture à petite échelle avec la cueillette de plantes sauvages et l’élevage de bétail après la période humide africaine. En Égypte et au Soudan, les communautés combinaient l’agriculture – axée sur le blé, l’orge et les légumineuses – avec la pêche, la production laitière et le brassage de la bière.

Les éleveurs, en particulier, ont développé des stratégies très souples. Ils se sont adaptés aussi bien aux plaines chaudes qu’aux montagnes sèches, et à toutes sortes d’environnements intermédiaires. Les systèmes pastoraux (agriculture avec des animaux de pâturage) sont plus nombreux que tout autre système alimentaire sur les sites archéologiques. Ils présentent également la plus grande variété de signatures chimiques, preuve de leur adaptabilité à des environnements changeants.

Notre étude s’est également penchée sur la manière dont les gens utilisaient le bétail. Dans la plupart des cas, les troupeaux se nourrissaient de cultures locales (comme le mil ou les pâturages tropicaux) et s’adaptaient à différents milieux écologiques. Certains systèmes étaient très spécialisés, adaptés aux zones semi-arides ou montagneuses. D’autres rassemblaient des troupeaux mixtes, mieux adaptés aux zones plus humides ou situées à basse altitude. Parfois, les animaux étaient élevés en petit nombre pour compléter d’autres activités. Ils fournissaient du lait, de la bouse pour les cultures ou le feu, et servaient de sécurité en cas de mauvaise récolte.

Cette capacité d’adaptation explique pourquoi, au cours du dernier millénaire, les systèmes pastoraux sont restés si importants, en particulier dans les zones de plus en plus arides.

Stratégies de subsistance mixtes

L’étude apporte également des preuves solides d’interactions entre la production alimentaire et la cueillette, que ce soit au niveau communautaire ou régional.

Des stratégies de subsistance mixtes et dynamiques, comprenant des interactions telles que le commerce au sein et entre les communautés proches et lointaines, étaient particulièrement visibles pendant les périodes de stress climatique. C’est notamment le cas à la fin de la période humide africaine, il y a environ 5 500 ans, quand le climat est devenu plus sec et plus difficile.

Dans le sud-est de l’Afrique, il y a environ 2 000 ans, on voit apparaître des modes de vie très diversifiés. Ils mêlaient élevage, agriculture et cueillette de manière complexe. Ces systèmes ont sans doute émergé en réponse à des changements environnementaux et sociaux complexes.

Des changements complexes dans les interactions sociales – notamment en matière de partage des terres, des ressources et des connaissances – ont probablement favorisé cette capacité d’adaptation.

Comment le passé peut éclairer l’avenir

Les stratégies anciennes de subsistance peuvent servir de guide pour faire face aux changements climatiques d’aujourd’hui.

Notre analyse montre qu’au fil des siècles, les communautés ont combiné élevage, agriculture, pêche et cueillette en tenant compte des réalités locales. Ces choix leur ont permis de mieux résister à des conditions imprévisibles.

Elles ont mis en place des systèmes alimentaires qui fonctionnaient en harmonie avec la terre et la mer, et non contre elles. Elles s’appuyaient également sur des réseaux sociaux solides, fondés sur le partage des ressources, des connaissances et du travail.

Les réponses du passé face aux changements climatiques peuvent inspirer les stratégies actuelles et futures visant à renforcer la résilience des régions confrontées à des pressions sociales et environnementales.

The Conversation

Leanne N. Phelps est affiliée à la Columbia Climate School de l’université Columbia, au Jardin botanique royal d’Édimbourg, au Royaume-Uni, et à l’ONG Vaevae basée à Andavadoake, Toliara, Madagascar.

Kristina Guild Douglass bénéficie d’un financement de la Fondation nationale pour la science des États-Unis. Elle est affiliée à l’ONG Vae Vae.

ref. Adaptation au changement climatique en Afrique pendant 10 000 ans : une étude offre des enseignements pour notre époque – https://theconversation.com/adaptation-au-changement-climatique-en-afrique-pendant-10-000-ans-une-etude-offre-des-enseignements-pour-notre-epoque-261282

Leaders in India, Hungary and the US are using appeals to nostalgia and nationalism to attack higher education

Source: The Conversation – USA (2) – By Riyad A. Shahjahan, Professor of Higher, Adult and Life Long Education, Michigan State University

Two scholars argue that nostalgia and resentment fuel government attacks on universities. Rick Friedman/AFP

Harvard University is under siege by the Trump administration – and the world is watching. But this case isn’t just an American issue.

It’s part of a global trend: universities cast as enemies and institutions in need of reform. Populist, right-wing governments are blaming universities for tearing at the fabric of nations.

These attacks are part of a broader strategy known as affective nationalism. It occurs when leaders use emotions, not just ideas, to build national identity. Feelings such as fear, pride, nostalgia and resentment are deployed to create a story about who belongs, who doesn’t and who’s to blame.

As scholars who study nationalism, emotion and higher education, we explore the emotional politics behind these attacks.

Prime Minister of Hungary Viktor Orbán addresses a crowd.
Prime Minister Viktor Orbán of Hungary has been hostile to academic freedom.
Pierre Crom/Getty Images News

Global backlash

Much of President Donald Trump’s vision and rhetoric is inspired by Hungary, where Prime Minister Viktor Orbán has waged a culture war on higher education for over a decade, banning gender studies and reshaping university governance. Orbán’s attacks on Central European University expose his hostility to academic freedom, critical thinking and diversity. All are viewed as threats to his nationalist “illiberal democracy.”

Trump followed Orbán’s playbook. On May 22, 2025, his administration declared that Harvard could no longer enroll foreign students. A U.S. Department of Homeland Security statement claimed that university leaders “created an unsafe campus environment by permitting anti-American, pro-terrorist agitators.” The statement suggested that many of the so-called agitators were foreign students.

Similarly, in India, students at Jawaharlal Nehru University were labeled “anti-national” for protesting the Citizenship Amendment Act, which provides fast-track citizenship to non-Muslim refugees. The students argued that it marginalizes Muslims. Since 2016, the Modi government has increasingly used “anti-national” and sedition charges to silence student and academic dissent.

These labels – “elite,” “foreign” or “anti-national” – are not neutral. They fuel fear, resentment and powerful narratives that frame universities as threats. Harvard, Central European University and Jawaharlal Nehru University have become symbols of broader national anxieties around identity and belonging.

British-Australian feminist scholar Sara Ahmed’s work on the sticky nature of emotions helps reveal the two emotions that often appear in attacks on universities: nostalgia and resentment.

U.S. President Donald Trump signs an executive order with a 'Make America Great Again' hat near the document.
The Trump administration has used nostalgia as a tool in its attacks on Harvard University.
Chip Somodevilla/Getty Images News

Glorifying the nation’s past

Nostalgia is a longing for a better past.

Consider Trump’s “Make American Great Again” slogan. It implies the nation was once great, has declined and must reclaim its former glory. That’s a powerful emotional story. Nationalism often works this way – by telling a tale of a lost golden age and a future that must be saved.

For that reason, nostalgia is central to populist attacks on universities and institutional reform. U.S. Secretary of Education Linda McMahon, for example, evoked Harvard’s symbolic past as part of the American Dream, arguing it has lost its way and “put its reputation in serious jeopardy.”

In India, Modi’s government rejects Western influence, while using nostalgia to revive a Hindu past in higher education. The Modi government promotes national pride on campuses by glorifying military heroes and installing symbolic figures – such as the statue of Swami Vivekananda, a Hindu monk and philosopher, at Jawaharlal Nehru University – to shape student identity and loyalty.

In Hungary, Orbán mobilizes a glorified Christian past to challenge discourses on diversity, inclusion, critical inquiry and academic freedom in higher education. A 2021 bill tasks universities with defending the nation and preserving its intellectual and cultural heritage.

Prime Minister of India Narendra Modi arrives at an event.
In India, the Modi government has increasingly framed public universities as institutions corrupted by Western ideas.
Tomas Cuesta/Getty Images News

Enemies of the nation

Resentment is a powerful emotion often used by states that see themselves as defenders of national unity and values. When Harvard resisted Trump’s reforms, the president framed the university’s stance in a Truth Social post as a betrayal to the nation, denouncing it as “terrorist inspired/supporting ‘sickness.’” Meanwhile, the Department of Education issued a statement that accused the university of a “troubling entitlement mindset.”

Similarly, in India, the Modi government has increasingly framed public universities – especially those with critical voices – as “anti-national” spaces. By casting critical voices as enemies within, the state turns resentment into a political weapon to justify the erosion of academic freedom.

In Hungary, the Orbán government mobilized resentment to portray universities and academics as disloyal elites working against the nation. One example of Hungary’s war on universities is the 2018 ban on gender studies, justified by the Orbán government as rejecting “socially constructed genders” in favor of “biological sexes.” This move reflects how the government uses resentment to assert ideological control over academic institutions.

Jawaharlal Nehru University students show their degrees during a convocation ceremony
Universities are under attack for what they represent.
Hindustan Times

Emotional battlegrounds?

Universities, especially elite ones such as Harvard and Jawaharlal Nehru University, carry deep symbolic weight. People care because of what the institutions represent.

Harvard, with its elite status, has long been a symbol of academic authority. But more recently, it has been cast as a defender of liberal higher education – making it a Trump administration target.

Jawaharlal Nehru University in India holds similar symbolic weight. It’s historically associated with producing the country’s social elites and is seen, especially in mainstream media, as left-leaning, making it a lightning rod in India’s polarized political landscape.

In Hungary, the Orbán government viewed Central European University as a danger because it threatened the government’s Christian-nationalist vision of the nation-state.

Universities are under attack not just for what they teach and research, but for what – and who – they represent. These are not just ideological disputes; they are emotional struggles over identity, belonging and public trust.

The Conversation

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment.

ref. Leaders in India, Hungary and the US are using appeals to nostalgia and nationalism to attack higher education – https://theconversation.com/leaders-in-india-hungary-and-the-us-are-using-appeals-to-nostalgia-and-nationalism-to-attack-higher-education-258975

‘I just couldn’t stop crying’: How prison affects Black men’s mental health long after they’ve been released

Source: The Conversation – USA (3) – By Helena Addison, Postdoctoral fellow, Yale University

Black men who have been incarcerated have elevated rates of PTSD, depression and psychological distress. da-kuk/E+ Collection via Getty Images

Mike returned home to Philadelphia after a 15-year prison sentence and suffered an emotional breakdown.

“I just couldn’t stop crying … I don’t know. It was the anxiety. It was just a lot,” he said. “I was under a lot of pressure and it just came crashing down.”

Mike, who was in his late 40s when we spoke, told me about his childhood filled with abuse, his first arrest at age 14, and the over 20 years of his life that he spent behind bars.

As a registered nurse and nurse scientist who studies how incarceration affects mental health, I know Mike’s experience after release from prison is not uncommon. Studies show that Black men who have experienced incarceration have higher rates of PTSD, depression and psychological distress compared with Black men who have never been incarcerated.

Working in psychiatric hospitals in Philadelphia, I met many patients in crisis who had been incarcerated at some point in their lives. As a part of my doctoral research, funded by the National Institute of Nursing Research, I interviewed 29 formerly incarcerated Black men to understand how incarceration has affected their mental health.

My peer-reviewed findings were published in the journal Social Science & Medicine. All quotes shared here use pseudonyms to protect the men’s privacy.

Trauma of incarceration

Mass incarceration in the U.S. has serious health consequences for individuals, families and communities. In Philadelphia alone, over 20,000 people return home from incarceration each year.

While incarceration rates are declining in Philadelphia, the needs of those coming home remain significant.

Many formerly incarcerated men described experiencing or witnessing violence, including being beaten by correctional officers and witnessing close friends get assaulted or killed.

“You know you are not regular because you come from a traumatic situation, right?” said Thomas, 44, who spent 18 years incarcerated.

The participants expressed that racism was common, especially while incarcerated in facilities located in the rural central and northern regions of Pennsylvania.

“I ain’t gonna sugar coat it – Black people going up into them white people mountains, they call you [n-word] all day long and you basically there to accept it,” Antonio told me.

Incarceration was especially difficult for those who were held for months pretrial without ever being convicted and those incarcerated during COVID restrictions who spent more than 23 hours a day in their cells.

‘Even though I’m free, I ain’t free’

Participants described life on parole or probation, or in transitional housing, as another form of confinement.

Ken, 56, has been out of prison for over a decade but said, “I’m still locked up, even though I’m free, I ain’t free. You just get a whole new set of rules and regulations.”

Men described significant anxiety related to community supervision requirements, including difficulty sleeping the night before a probation appointment.

Participants also described distress caused by “no association” restrictions. These are common parole and probation requirements that prohibit people under supervision from interacting with others who have criminal records, are also under supervision or are currently incarcerated. Violating this requirement can lead to a technical violation and reincarceration.

While these requirements are meant to reduce the risk of reoffending, they often isolate people from supportive relationships and resources, including housing and employment.

“[There are] a lot of smart brothers in there. And it hurts my heart. And that’s where the depression coming in too,” said Reese, who spent six years incarcerated. “I can’t contact them in jail. … That’s just how it is in the system.”

Philadelphia has the highest rate of community supervision – including probation and parole – among the largest U.S. cities, according to a 2019 analysis by The Philadelphia Inquirer.

At that time, the Inquirer reports, 1 in 23 adults in Philadelphia were under community supervision – and 1 in 14 Black adults in Philadelphia.

The men I interviewed said they felt like parts of them never left jail or prison, while others felt that they brought prison or jail home with them.

Tyrese, 34, said he stays home as often as he can.

“I’ve been out of the joint for seven years now and feel like I’m still institutionalized, I guess,” he said. “I know people that don’t even come outside,” referring to other formerly incarcerated men.

Others had dreams that they were back in a cell, or at home still wearing jail clothing. Long after release, many described constant hypervigilance and anxiety.

“I can be walking to the bus station and there be people walking around me, I’m constantly watching them,” said Anthony, who was first incarcerated at age 18 and served 16 years. “I’m watching every movement they’re doing. That’s a habit I had from jail.”

Man in black hoodie that says 'Free Meek' interacts with crowd of supporters in street
Philly rapper Meek Mill, shown here at a 2018 rally outside a Center City courthouse, was sentenced to probation for 10 years after a conviction on drug and gun charges. He became an advocate of criminal justice reform.
Michael Candelori/Pacific Press/LightRocket via Getty Images

Finding work

People who have been incarcerated often struggle to find employment after release, as many employers are unwilling to hire a person with a criminal record.

This leaves about 35% of formerly incarcerated Black men unemployed.

At the time of our interview, Tay, 31, was working part-time in carpentry. “Because I had felonies on my record a lot of places won’t hire me,” he said. “And a couple of places that I was working with, they ended up firing me once they did the background check.”

These frustrations can easily spill over into family life.

Mark, 30, also works part-time and said he found himself frequently becoming agitated and snapping at his kids, other family members and his girlfriend. “I can’t get the job I want or the job that I need to do what I need to do for my family and I’ll be frustrated,” he shared.

Participants struggled with having to depend on others for basic needs upon release. Kenny, who is now self-employed as a caterer, recalled his experience a few years earlier. “I was crying. I was a grown man, almost 40 years old, and my mother had to buy me underwear, socks,” he said.

The importance of fatherhood

Despite their many hardships, some of the men spoke with joy about reconnecting with their children.

“I think the most positive thing that happened since I’ve been out of prison is I got custody of my sons,” said Ken, a father of two. “Them kids saved me.”

Like many of the other participants with children, however, he was frustrated about being unable to provide for them and worried about repeating harmful cycles.

“You want to do good, but it makes you think bad stuff when you don’t have the right resources,” he continued. “You don’t want [your kids] to do the same things you did.”

Others struggled to bond with their children after years of separation.

John, 29, explained, “The bonding is kind of awkward, because you wasn’t there, especially during the pandemic when there was no visits allowed.”

Returning to disadvantaged neighborhoods

Most people released from incarceration return to neighborhoods with high rates of poverty, violence and other disadvantages.

Shawn, who lives in pubic housing, showed me abandoned buildings and boarded storefronts in his neighborhood and described how the environment made rebuilding his life harder.

For many participants, returning to divested communities brought stress. They experienced frequent exposure to substance use, violence and negative police encounters, and they had limited access to basic resources and job opportunities needed to support recovery and stability.

“This is my real life. It’s not fake. It’s not no, ‘Well, why did he go back and do this or that?’” he said. “I live in an underserved, impoverished, danger zone – period.”

Moving forward

The experiences these men shared with me demonstrate how traumatic incarceration is, even many years after release.

Supporting the mental health of formerly incarcerated Black men requires trauma-informed services, such as culturally responsive counseling, peer support and care that acknowledges the lasting effects of incarceration.

It also means helping them build or rebuild their financial resources, reconnect with their children and loved ones, and supporting the broader communities they return to through investment in housing, employment and accessible health and social services.

The Conversation

Helena Addison received funding from National Institute of Nursing Research of the National Institutes of Health under Award Number F31NR020434, the Substance Abuse and Mental Health Administration and American Nurses Association Minority Fellowship Program, the University of Pennsylvania’s Presidential PhD Fellowship, and Jonas Philanthropies to support this study and/or her PhD training. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health, or any other funding organizations or institutions. The views expressed in written training materials or publications and by speakers and moderators do not necessarily reflect the official policies of the Department and Human Services; nor does mention of trade names, commercial practices, or organizations imply endorsement by the U.S. Government.

ref. ‘I just couldn’t stop crying’: How prison affects Black men’s mental health long after they’ve been released – https://theconversation.com/i-just-couldnt-stop-crying-how-prison-affects-black-mens-mental-health-long-after-theyve-been-released-259975

About a third of pregnant women in the US lack sufficient vitamin D to support healthy pregnancies − new research

Source: The Conversation – USA (3) – By Melissa Melough, Assistant Professor of Nutrition Science, University of Delaware

Higher vitamin D levels in a mother’s blood during pregnancy have been linked to higher IQ scores in early childhood and reduced behavioral problems.
gpointstudio/iStock via Getty Images

Children whose mothers had higher vitamin D levels during pregnancy scored better on tests of memory, attention and problem-solving skills at ages 7 to 12 compared with those whose mothers had lower levels. That is a key finding of a new peer-reviewed study that my colleagues and I published in The American Journal of Clinical Nutrition.

While vitamin D has long been known for its role in maintaining bone health, scientists have since uncovered its importance in regulating immune function, reducing inflammation and protecting the nervous system. Now, growing evidence – including our new findings – suggest it may also support brain development beginning in the womb.

My team and I found that the link between prenatal vitamin D levels and childhood cognition was strongest among Black families, who also face higher rates of vitamin D deficiency.

This suggests that vitamin D supplementation may be a promising, low-cost strategy to support brain development while reducing racial disparities. Our study also suggested that vitamin D levels early in pregnancy may be most important for childhood cognitive development, highlighting the importance of early action by health care providers.

We analyzed more than 900 mother-child pairs across the U.S. who participated in a large national study called ECHO, short for Environmental influences on Child Health Outcomes. We measured vitamin D in the mothers’ blood during pregnancy and assessed children’s cognitive abilities using a standardized test battery. We also accounted for other important factors that shape childhood development such as the mother’s education, neighborhood conditions and the child’s age and sex.

This new study builds on our earlier findings that higher vitamin D levels during pregnancy are linked to higher IQ in early childhood and with reduced behavioral problems in middle childhood.

Collectively, these studies suggest that vitamin D plays a crucial role in brain development during pregnancy, with lasting benefits for children’s cognitive and behavioral outcomes.

A female doctor holding a clipboard and pen watches a young child play with blocks.
The children of mothers who had higher vitamin D levels during pregnancy scored better on tests of memory, attention and problem-solving skills at ages 7 to 12.
Prostock-Studio/iStock via Getty Images Plus

Why it matters

Vitamin D deficiency is a common global problem.

In the U.S., about 42% of adults have vitamin D levels below 20 nanograms per milliliter, or ng/ml, a commonly used cutoff for deficiency. About a third of U.S. pregnant women are deficient, and the rates are even higher among Black pregnant women, with 80% found to be deficient. This racial difference is partly due to differences in skin pigmentation, as melanin pigment reduces the skin’s ability to produce vitamin D from sunlight.

Although we can get vitamin D both from sun exposure and our diets, deficiency is common because these sources don’t meet everyone’s needs. Sunlight isn’t always a reliable source, especially for people with darker skin, those living in northern climates or those who often wear sunscreen or sun-protective clothing. Natural food sources such as fatty fish, egg yolks and certain mushrooms contain some vitamin D, and fortified products such as milk and breakfast cereals help, but not everyone eats enough of these foods to maintain healthy vitamin D levels.

That’s why supplements are often necessary and are recommended in many cases by the Dietary Guidelines for Americans.

Although current guidelines recommend that pregnant women consume 600 international units, or IUs, of vitamin D daily, higher doses of at least 1,000 to 2,000 IU are often needed to correct deficiency. On average, U.S. women consume only 168 IU from food and beverages, and many prenatal vitamins provide just 400 IU. This highlights an important opportunity for clinicians to improve screening and support around vitamin D supplementation both before and during pregnancy.

If a simple, low-cost strategy such as prenatal vitamin D supplementation can help support brain development, it may yield lasting benefits for children. Long-term studies have shown that higher cognitive scores in childhood are linked to better memory and reasoning in older age, as well as longer lifespan.

What still isn’t known

While our studies have linked higher vitamin D levels in pregnancy to improved cognitive and behavioral development in children, we cannot yet prove that vitamin D is the direct cause.

Therefore, studies called randomized controlled trials – the gold standard of research – are needed to confirm these findings and determine how best to translate them into clinical practice. These studies will be essential for determining the optimal target levels for vitamin D to support brain development in pregnancy.

The Research Brief is a short take on interesting academic work.

The Conversation

Melissa Melough receives funding from the National Institutes of Health (NIH).

ref. About a third of pregnant women in the US lack sufficient vitamin D to support healthy pregnancies − new research – https://theconversation.com/about-a-third-of-pregnant-women-in-the-us-lack-sufficient-vitamin-d-to-support-healthy-pregnancies-new-research-259433

Can AI think – and should it? What it means to think, from Plato to ChatGPT

Source: The Conversation – USA (3) – By Ryan Leack, Assistant Professor of Writing, USC Dornsife College of Letters, Arts and Sciences

Ancient Greek concepts about intelligence can shed light on 21st-century tech they never knew. agsandrew/iStock via Getty Images Plus

In my writing and rhetoric courses, students have plenty of opinions on whether AI is intelligent: how well it can assess, analyze, evaluate and communicate information.

When I ask whether artificial intelligence can “think,” however, I often look upon a sea of blank faces. What is “thinking,” and how is it the same or different from “intelligence”?

We might treat the two as more or less synonymous, but philosophers have marked nuances for millennia. Greek philosophers may not have known about 21st-century technology, but their ideas about intellect and thinking can help us understand what’s at stake with AI today.

The divided line

Although the English words “intellect” and “thinking” do not have direct counterparts in the ancient Greek, looking at ancient texts offers useful comparisons.

In “Republic,” for example, Plato uses the analogy of a “divided line” separating higher and lower forms of understanding.

A close-up of a mosaic shows several men talking and sitting in a semicircle outside, wearing robes.
A Roman mosaic from Pompeii depicts Plato’s academy in Greece.
Wikimedia Commons

Plato, who taught in the fourth century BCE, argued that each person has an intuitive capacity to recognize the truth. He called this the highest form of understanding: “noesis.” Noesis enables apprehension beyond reason, belief or sensory perception. It’s one form of “knowing” something – but in Plato’s view, it’s also a property of the soul.

Lower down, but still above his “dividing line,” is “dianoia,” or reason, which relies on argumentation. Below the line, his lower forms of understanding are “pistis,” or belief, and “eikasia,” imagination.

Pistis is belief influenced by experience and sensory perception: input that someone can critically examine and reason about. Plato defines eikasia, meanwhile, as baseless opinion rooted in false perception.

In Plato’s hierarchy of mental capacities, direct, intuitive understanding is at the top, and moment-to-moment physical input toward the bottom. The top of the hierarchy leads to true and absolute knowledge, while the bottom lends itself to false impressions and beliefs. But intuition, according to Plato, is part of the soul, and embodied in human form. Perceiving reality transcends the body – but still needs one.

So, while Plato does not differentiate “intelligence” and “thinking,” I would argue that his distinctions can help us think about AI. Without being embodied, AI may not “think” or “understand” the way humans do. Eikasia – the lowest form of comprehension, based on false perceptions – may be similar to AI’s frequent “hallucinations,” when it makes up information that seems plausible but is actually inaccurate.

Embodied thinking

Aristotle, Plato’s student, sheds more light on intelligence and thinking.

A small relief depicts two men in robes gesturing while they speak animatedly with each other.
A 15th-century relief of Aristotle and Plato by Luca della Robbia in the Florence Cathedral in Italy.
sailko/Wikimedia Commons, CC BY-SA

In “On the Soul,” Aristotle distinguishes “active” from “passive” intellect. Active intellect, which he called “nous,” is immaterial. It makes meaning from experience, but transcends bodily perception. Passive intellect is bodily, receiving sensory impressions without reasoning.

We could say that these active and passive processes, put together, constitute “thinking.” Today, the word “intelligence” holds a logical quality that AI’s calculations may conceivably replicate. Aristotle, however, like Plato, suggests that to “think” requires an embodied form and goes beyond reason alone.

Aristotle’s views on rhetoric also show that deliberation and judgment require a body, feeling and experience. We might think of rhetoric as persuasion, but it is actually more about observation: observing and evaluating how evidence, emotion and character shape people’s thinking and decisions. Facts matter, but emotions and people move us – and it seems questionable whether AI utilizes rhetoric in this way.

Finally, Aristotle’s concept of “phronesis” sheds further light on AI’s capacity to think. In “Nicomachean Ethics,” he defines phronesis as “practical wisdom” or “prudence.” “Phronesis” involves lived experience that determines not only right thought, but also how to apply those thoughts to “good ends,” or virtuous actions. AI may analyze large datasets to reach its conclusions, but “phronesis” goes beyond information to consult wisdom and moral insight.

‘Thinking’ robots?

Today, AI takes on many physical forms, from autonomous vehicles and humanoid robots to health care robots and drones. If intelligence requires embodiment, as Plato and Aristotle believed, it might seem as if AI is coming closer than ever to human thinking.

AI does take on many forms, but they’re still not bodies; they run on code, algorithms and datasets. Intuitive understanding, emotion, integrity and practical wisdom seem to require an embodied, perishable form that is moved by experience.

Perhaps we should ask AI itself – so I did. When I prompted ChatGPT with the simple question, “Can you think?” it responded: “I can process information, analyze patterns, and generate responses based on data. So in some ways, it might ‘seem’ like I’m thinking. But it’s not thinking like a human does. I don’t have consciousness, emotions, intentions, or awareness. Everything I ‘do’ is based on patterns learned from huge amounts of text and a set of rules and probabilities. I can ‘simulate’ certain aspects of thinking, but I don’t truly think or understand in the human sense.”

That response aligns with Plato and Aristotle’s views. For now.

The Conversation

Ryan Leack 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. Can AI think – and should it? What it means to think, from Plato to ChatGPT – https://theconversation.com/can-ai-think-and-should-it-what-it-means-to-think-from-plato-to-chatgpt-256648

EU efforts to measure companies’ environmental impacts have global effects. Here’s how to make them more just

Source: The Conversation – France – By Mira Manini Tiwari, Research Associate at the Robert Schuman Centre for Advanced Studies, European University Institute

If you choose to buy a sustainable product at the supermarket, or invest in a sustainable portfolio at your bank, how far does that sustainability reach? Does the product’s “sustainable” label account for the environmental and labour costs where the raw materials were extracted? Does the portfolio include renewable energy in countries where the investment is needed most?

In the EU, whether you are an individual or represent a company or financial institution, these questions are governed by the bloc’s non-financial reporting (NFR) regulations. The latest ones include the European Sustainable Reporting Standards (ESRS), which are gradually coming into force through 2029. The ESRS set out reporting standards and requirements, while the Corporate Sustainability Reporting Directive (CSRD) determines which companies these standards apply to, to what extent, and when.

These EU regulations also have strong implications for the Majority World, the countries and territories outside Europe and North America where most people live, at a time when global, systemic policy effects are more important than ever. As supply chains become longer and more interconnected, and as communities involved in them confront the fragilities of economic, political and climate shifts, the regulations that govern the sustainability of these chains and that enable or prohibit participation in them must be crafted and implemented to minimise harm to the most vulnerable.

In an article in Environment and Development Economics, my co-authors and I developed a set of proposals to improve the global sustainability of the NFR regulations. These call for collaborative development of regulations across the value chain, better data accessibility, measuring of and accounting for cross-border environmental damage, and greater integrity and engagement from financial actors.


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Cooperation, not compliance

As the ESRS come into force, reporting requirements are being applied to companies’ full value chains. This means that Majority World actors, such as those that extract raw materials for European products, may be indirectly subjected to the NFR regulations. This is important, as it holds companies and consumers, EU and non, accountable for the ethics of the goods and services they rely on. However, when regulations are built without directly involving those they will affect, they risk causing collateral, longer-term damage. For example, reporting requirements that feel inaccessible to smaller organisations can foster distrust and backlash, or cause companies to withdraw from contexts where data are less accessible, taking away key sources of income for communities.

While global climate negotiations have come under public scrutiny for their Minority World dominance, there has been relatively less scrutiny of global organisations governing financial and corporate sustainability standards. On their boards, the Majority World is conspicuous by its absence, demonstrating the dearth of attention to its agency in enabling greater sustainability, both locally and globally. European investors and policymakers are already shifting capital from the Majority World back to the EU in response to the NFR regulations, citing the difficulty of accounting for activities along the length of value chains. The damage falls on livelihoods, industries and essential investments, such as in renewable energy, which can suddenly disappear.

Developing NFR regulations in collaboration with all stakeholders, rather than only at the top, can provide a regulatory landscape that is, from the outset, more implementable, accessible and effective in the long run.

Democratic data and digitalisation

Efficacy in global NFR regulations relies on global data cooperation, which could lower the administrative burden on those reporting and enable greater accountability. The increasing number of EU NFR regulations do not exist in a vacuum: they have been accompanied by shifts in global regulations and a proliferation of national regulations. With regulations expanding to cover the full value chain, actors are increasingly likely to be subjected to multiple regulatory bodies, or have to provide data to reporting entities upstream. The time, financial resources and practical challenges involved in identifying, collecting, processing and sharing data are considerable, both for those submitting data and those receiving and verifying them. This makes divestment or significant losses more likely. Furthermore, the expansion of regulations can result in isolated streams of data and closed-circuit processes, which, in turn, cut out civil society organisations and individuals who use data to help hold firms to account for their social and environmental responsibilities.

Aside from EU calls for a European Single Access Point for corporate data, Majority World contexts offer particularly fertile ground for reimagining and building data infrastructures. Digitalisation in low- and middle-income countries is growing rapidly, and demonstrates the ability to make digital financial and business instruments democratic and accessible to those with the fewest resources. Such efforts should involve statisticians and local data experts from the outset to determine and harmonise appropriate data, along with transnational entities with the mandate of establishing links across data systems.

Support for international emissions accounting

Corporate reporting on environmental impacts must be accompanied by their reduction. Indeed, the work and transparency required to identify impacts in the first place, let alone mitigate them, underpins decisions to simply detach from the system, moving economic activity to local contexts where impacts are more traceable.

Firms that cannot afford to bring their activities onshore must account for emissions that occur from assets not directly under their ownership or control, which are known as Scope 3 emissions. In some cases, these emissions constitute well over half of a firm’s total value chain emissions. However, the implementation of the ESRS has designated the reporting of Scope 3 emissions, and climate impacts in general, to be largely discretionary, under the condition that firms provide evaluations of the economic and material implications of a given activity in their value chains.

The glaring gaps between some firms’ targets, actions and declarations are in part enabled by reporting systems that allow the omission of more distant climate risks and impacts, maintaining the misalignment between climate pledges and actions aimed at achieving them. While the number of firms showing readiness to comply with Scope 3 accounting is increasing, data on global investor preferences suggests that investors do not necessarily prioritise companies’ performance on these emissions when making investment decisions. For ethics to exist on the ground, they must be prioritised in financial flows.

Investment with integrity

In light of the above, financial institutions have a core responsibility to engage with NFR. These institutions’ economic leverage and centrality in the value chains and activities of several sectors give them incentivising power to catalyse a shift from the submission of reports to the building of living data systems and the achievement of fuller value chain accountability. Currently, many investors are not willing to accept reductions in their returns in exchange for the pursuit of social or environmental goals. Surveys suggest this is in part due to perceptions of low quality of environmental information, limited ability to assess the data received, and the difficulty of making investment decisions accordingly. In the current landscape of Minority World-led reporting, such mistrust is likely to be greater with respect to Majority World data, reiterating the need for data systems and reporting mechanisms built on equal footing.

Financial institutions can operate proactively, using their privileged access to data to bridge Minority and Majority World actors engaging in sustainable practices, such as microfinance bodies, local communities and relevant investors. Doing so could plug, at least in part, an information and trust gap that can hinder Minority World firms’ investment in unfamiliar contexts.

Regulating for whom?

The research underpinning our article initially involved a recommendation on streamlining and supporting reporting by small and medium enterprises (SMEs), which account for more than 60% of the EU’s corporate emissions. For these firms, especially, regulators face a critical balance between lowering the entry barrier of the reporting ecosystem and setting robust environmental targets. The nature, data points and timelines of reporting under the CSRD are currently under review following calls for simplification and greater support, and decision-makers are wrestling with the tension between accessibility and integrity.

Our work also included a recommendation that turns from the supply side, the focus of the preceding proposals, to the demand side: the data and sustainability literacy of the individual who walks into the supermarket to buy that sustainable product, or wants family investments to do more good than harm. Across sectors – public policy, investment and citizen engagement – resources must be dedicated to these literacies, so that actors are better placed to hold each other to account. Regulation becomes easily abstracted, reduced to figures and PDFs, databases and scores. Beneath each regulation is a world of citizens whose homes, livelihoods and health depend on them.

The Conversation

The author was affiliated with the University of Siena during the period in which she and her colleagues did the original work for the scholarly article that is mentioned in this piece. The author’s affiliation came via a project that, overall, was financed by the Italian National Recovery and Resilience Plan (PNRR). The scholarly article and the present article were not outputs for the project.

ref. EU efforts to measure companies’ environmental impacts have global effects. Here’s how to make them more just – https://theconversation.com/eu-efforts-to-measure-companies-environmental-impacts-have-global-effects-heres-how-to-make-them-more-just-261226

Clawback of $1.1B for PBS and NPR puts rural stations at risk – and threatens a vital source of journalism

Source: The Conversation – USA – By Allison Perlman, Associate Professor of Film & Media Studies, University of California, Irvine

Nathan Heffel and Grace Hood rehearse their Colorado Public Radio public affairs program in Centennial, Colo., in 2017. Andy Cross/The Denver Post via Getty Images

The U.S. Senate narrowly approved on July 16, 2025, a bill that would claw back federal funding for the Corporation for Public Broadcasting, which distributes money to NPR, PBS and their affiliate stations. The US$9 billion rescission package will withdraw $1.1 billion Congress had previously approved for the CPB to receive in the 2026 and 2027 fiscal years. In addition, it makes deep foreign aid cuts. All Democrats present voted against the measure, joined by two Republicans: Sens. Susan Collins of Maine and Lisa Murkowski of Alaska. As long as the House, which approved a previous version, votes in favor of the Senate’s version of the bill by midnight July 18, Trump will be able to meet a budgetary deadline by signing the measure into law in time for it to take effect.

What will happen to NPR, PBS and local stations?

NPR and PBS provide programming to local public television and radio stations across the country. The impact on them will be direct and indirect.

Both NPR and PBS receive money from the Corporation for Public Broadcasting, an independent nonprofit corporation Congress created in 1967 to receive and distribute federal money to public broadcasters. More than 70% of the money it distributes flows directly to local stations. Some stations get up to half of their budgets from the CPB.

But NPR and PBS get much of their funding from foundation grants, viewers’ and listeners’ donations, and corporate underwriting. And local public radio and TV stations also get support from an array of sources besides CPB.

“There’s nothing more American than PBS,” said the network’s CEO, Paula Kerger, at a congressional hearing on March 26, 2025.

Only about 1% of NPR funding, and 15% of PBS funding, comes directly from the government via the CPB. However, once local radio and television stations lose federal funding, they’ll be less able to pay NPR and PBS for the programs they produce.

The nearly 1,500 public media stations in the U.S. rely on a mix of NPR, PBS and third-party producer programming, such as American Public Media and PRX, for the programs they offer. Local stations also produce and air regional news and provide emergency broadcasts for the government.

In rural areas with few broadcast stations and spotty cellphone coverage, public broadcast stations are vital sources of information about important community news and updates during emergencies. Federal support is essential for the programming and day-to-day operations of many local stations and allows for the maintenance of equipment and personnel to operate these vital community resources.

We believe that stations in communities that most need them, especially in rural locations, would be hit especially hard because they rely heavily on CPB funding.

Why are Republicans taking this step?

Public broadcasting has long been a target of conservative Republicans. They say that with a highly diversified media landscape, the public no longer needs media that is subsidized by federal dollars. They also claim that public broadcasting has a liberal bias and taxpayers should not be required to fund media that slants to the left politically.

Why is public media necessary when there’s news on the internet?

As journalism revenue has plummeted, public broadcasting has remained a vital source for news in communities across the nation. This is especially true in rural communities, where economic and political pressures have threatened the survival of local journalism.

In addition, with much online news coverage placed behind paywalls, public radio and television plays an important role in making quality journalism available to the American public.

An online ad for a program, 'Water News,' on a public radio station.
Want crucial information about water systems in your drought-prone community? Public radio station KVMR in Nevada City, Calif., has a program for you.
KVMR screenshot

Why did Congress approve these funds 2 years ahead?

Public broadcasting has gotten roughly $550 million per year from the federal government in recent years. The CPB has always approved and designated those funds two years in advance, due to a provision in the Public Broadcasting Act of 1967, after Congress has voted to provide that money. The CPB then has distributed that funding primarily through grants to PBS and NPR affiliate stations to support their technical infrastructure, program development and audience research.

What are the consequences for Native communities?

Dozens of Native American stations are at risk of closing once the CPB is defunded. Native Public Media, a network of 57 radio stations and four TV stations, is a key source of news and information for tribal communities across the nation and relies on CPB support.

U.S. Sen. Mike Rounds, a South Dakota Republican, publicly stated that he secured an agreement with the White House to move $9.4 million in Interior Department funding to two dozen Native American stations. But there is no provision related to this promise within the legislation.

The Conversation

Allison Perlman is the co-chair of the Scholars Advisory Committee of the American Archive of Public Broadcasting.

Josh Shepperd and Allison Perlman are under contract to co-author an update of the history of public broadcasting for Current, public media’s trade journal, and the Corporation for Public Broadcasting. Josh and Allison are not paid employees or vendors of either institution.

ref. Clawback of $1.1B for PBS and NPR puts rural stations at risk – and threatens a vital source of journalism – https://theconversation.com/clawback-of-1-1b-for-pbs-and-npr-puts-rural-stations-at-risk-and-threatens-a-vital-source-of-journalism-255826

Âgisme et sexisme : dès 45 ans, les femmes sont victimes de préjugés sur le marché du travail, selon une étude

Source: The Conversation – in French – By Martine Lagacé, Professeur titulaire, communication et psychologie sociale, L’Université d’Ottawa/University of Ottawa

En 2024, une étude empirique a permis de dresser un portrait nuancé de la réalité des femmes de 45 ans et plus. (Unsplash)

Elles sont qualifiées, engagées, et pourtant souvent invisibles. Les femmes de 45 ans et plus représentent une force croissante sur le marché du travail québécois. Mais leur expérience suffit-elle à les protéger des préjugés liés à l’âge et au genre ?

Au Québec, on observe une augmentation continue du nombre de personnes âgées de 55 à 69 ans qui demeurent sur le marché du travail, particulièrement chez les femmes. Chez ces dernières, le taux d’activité est, en effet, en croissance constante, particulièrement dans la tranche d’âge de 55 à 59 ans (+ 30 points selon l’Institut de la statistique du Québec).

Malgré tout, ce renfort démographique n’est sans doute pas suffisant pour faire oublier les préjugés liés à l’âge et au genre.




À lire aussi :
Un monde du travail à réinventer pour faire une meilleure place aux femmes


Mieux comprendre l’expérience des travailleuses d’expérience

En 2024, une étude empirique, pilotée par notre équipe de chercheurs et mandatée par le Comité consultatif pour les travailleuses et travailleurs de 45 ans et plus, a permis de dresser un portrait nuancé de leur réalité. L’objectif : cerner leur expérience subjective du marché du travail. Comment perçoivent-elles leur emploi ? Qu’est-ce qui les motive à continuer ? Quels obstacles rencontrent-elles, et comment envisagent-elles la retraite ?

Pour répondre à ces questions, 455 femmes âgées de 45 ans et plus travaillant sur le territoire québécois ont répondu à un questionnaire auto-rapporté. Pourquoi ce seuil d’âge ? Car une littérature abondante suggère que dès l’âge de 45 ans, les travailleurs risquent d’être la cible de comportements et de manifestations d’attitudes âgistes.

Une femme aux longs cheveux gris penchés sur un bureau, crayon à la main
Dès l’âge de 45 ans, les travailleurs risquent d’être la cible de comportements et de manifestations d’attitudes âgistes.
(Unsplash), CC BY

Des 455 participantes, la majorité (55 %) était âgée de 45 à 54 ans, et plus d’un tiers détenaient une formation universitaire. En outre, 88 % de ces femmes se disaient en « bonne » ou « très bonne » santé, physique et mentale. Les quatre secteurs de travail les plus représentés dans l’échantillon étaient l’éducation (28,3 %), la santé (19,4 %), les ventes et services (19,2 %) ainsi que l’administration (80 %). Enfin, la majorité des participantes (58 %) travaillaient dans le secteur public.

Travail valorisant et motivation intrinsèque : un duo gagnant

La majorité des répondantes (84 %) se disent satisfaites ou très satisfaites de leur emploi, surtout lorsqu’elles sont motivées par des raisons personnelles ou sociales : sentiment d’accomplissement, contribution à une mission, défis stimulants.

À l’inverse, celles qui mentionnent la rémunération comme motivation principale se déclarent généralement moins satisfaites. Une tendance qui s’aligne avec la théorie de l’auto-détermination : les motivations extrinsèques, comme l’argent, ne suffisent pas à combler les besoins fondamentaux d’autonomie, de compétence et de lien social.

L’âgisme et le sexisme

Bien que la majorité des participantes soient globalement satisfaites de leur emploi, 27 % d’entre elles qualifient le marché du travail d’âgiste et/ou sexiste envers les travailleuses plus âgées, et près de 20 % évoquent des obstacles concrets. Voici quelques-uns de leurs commentaires :

Dans mon milieu, il y a définitivement un changement face aux femmes de 50 ans et plus. J’ai vu une attitude âgiste chez les hommes qui sont en position d’autorité.

La stigmatisation liée au fait d’être une femme affecte la façon dont mes collègues la perçoivent dans une certaine mesure.

Dur, car l’âge ne joue pas en notre faveur. Le choix est restreint, malgré l’expérience et la maturité, c’est encore un monde où des hommes de 45 ans ont plus de chance d’obtenir des postes de cadre.

Cette perception de discrimination, fondée sur l’âge et/ou le genre, s’exprime aussi sous la forme d’une fracture générationnelle : les travailleuses plus âgées se sentent désavantagées et expriment leur frustration en comparant leur situation à celle des plus jeunes, que ce soit pour les façons de faire au travail ou encore pour les conditions de recherche d’emploi.

Les travailleuses plus âgées se sentent désavantagées et expriment leur frustration en comparant leur situation à celle des plus jeunes.
(Vitaly Gariev sur Unsplash), CC BY

Voici certains témoignages de participantes :

Nous sommes en constante compétition. Les employeurs ne veulent pas prendre de risque d’engager une femme de plus de 45 ans. Et la nouvelle génération est très différente.

Très honnêtement, je pense qu’il est difficile pour une femme de cet âge de réintégrer le marché du travail après une perte d’emploi.

Les retombées de la discrimination fondée sur l’âge

Les résultats de l’étude montrent aussi que les participantes qui se sentent victimes de l’âgisme éprouvent une moins grande satisfaction au travail. Elles sont aussi plus nombreuses à envisager un départ à la retraite à court terme, c’est-à-dire au cours de la prochaine année, par comparaison avec celles qui n’éprouvent pas ce sentiment (soit 12,7 % pour les premières et 6,1 % pour les secondes).

Plus encore, les résultats montrent un lien significatif entre le ressenti d’âgisme et la perception de relations plus difficiles, plus tendues avec les gestionnaires, particulièrement avec les plus jeunes. « Il y a beaucoup de micro-gestion, des enjeux de communication, peu d’écoute et de reconnaissance de notre expérience », nous a dit l’une des participantes.


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Enfin, lorsqu’elles sont questionnées sur l’importance de la transmission de leurs connaissances aux plus jeunes travailleurs, la majorité répond par l’affirmative (72 %). Toutefois, celles qui se perçoivent victimes de l’âgisme témoignent du même coup d’un certain manque de réceptivité des plus jeunes travailleurs à l’égard de ces connaissances ainsi que d’une dévalorisation de leur expérience par l’employeur.

Repenser la culture du travail

Dans l’ensemble, ces résultats, même à partir d’un échantillon restreint, corroborent de nombreuses études montrant la persistance de l’âgisme au travail, doublée, pour les femmes, des stéréotypes de genre, en dépit de leur expérience. Cette réalité dépeinte par ces femmes, on peut le présumer, pèse sur leurs décisions d’interrompre malgré elles leur carrière.

Une femme aux cheveux gris coupés courts assise devant un ordinateur, un crayon à la main
La persistance de l’âgisme au travail, doublée, pour les femmes, des stéréotypes de genre, en dépit de leur expérience, teintent la carrière des femmes.
(Unsplash), CC BY

L’âgisme ciblant les travailleuses d’expérience demeure un phénomène sous-estimé. Ses conséquences sur le bien-être de ces travailleuses, comme pour la santé des organisations n’en sont pas moins négatives. Or si l’on veut réellement reconnaître la contribution de ces femmes, il est urgent de repenser la culture de nos environnements de travail dans un esprit d’inclusion et d’équité.

Le point de départ pour ce faire n’est autre qu’une prise de conscience, de la part des employeurs comme des travailleurs, de la prévalence des préjugés âgistes et sexistes, et des pratiques discriminatoires qui peuvent en découler.

La Conversation Canada

Martine Lagacé a reçu un financement du Comité consultatif pour les travailleuses et travailleurs de 45 ans et plus pour effectuer cette étude.

ref. Âgisme et sexisme : dès 45 ans, les femmes sont victimes de préjugés sur le marché du travail, selon une étude – https://theconversation.com/agisme-et-sexisme-des-45-ans-les-femmes-sont-victimes-de-prejuges-sur-le-marche-du-travail-selon-une-etude-252973

Âgisme et sexisme : dès l’âge de 45 ans, les femmes sont victimes de préjugés sur le marché du travail, selon une étude

Source: The Conversation – in French – By Martine Lagacé, Professeur titulaire, communication et psychologie sociale, L’Université d’Ottawa/University of Ottawa

En 2024, une étude empirique a permis de dresser un portrait nuancé de la réalité des femmes de 45 ans et plus. (Unsplash)

Elles sont qualifiées, engagées, et pourtant souvent invisibles. Les femmes de 45 ans et plus représentent une force croissante sur le marché du travail québécois. Mais leur expérience suffit-elle à les protéger des préjugés liés à l’âge et au genre ?

Au Québec, on observe une augmentation continue du nombre de personnes âgées de 55 à 69 ans qui demeurent sur le marché du travail, particulièrement chez les femmes. Chez ces dernières, le taux d’activité est, en effet, en croissance constante, particulièrement dans la tranche d’âge de 55 à 59 ans (+ 30 points selon l’Institut de la statistique du Québec).

Malgré tout, ce renfort démographique n’est sans doute pas suffisant pour faire oublier les préjugés liés à l’âge et au genre.




À lire aussi :
Un monde du travail à réinventer pour faire une meilleure place aux femmes


Mieux comprendre l’expérience des travailleuses d’expérience

En 2024, une étude empirique, pilotée par notre équipe de chercheurs et mandatée par le Comité consultatif pour les travailleuses et travailleurs de 45 ans et plus, a permis de dresser un portrait nuancé de leur réalité. L’objectif : cerner leur expérience subjective du marché du travail. Comment perçoivent-elles leur emploi ? Qu’est-ce qui les motive à continuer ? Quels obstacles rencontrent-elles, et comment envisagent-elles la retraite ?

Pour répondre à ces questions, 455 femmes âgées de 45 ans et plus travaillant sur le territoire québécois ont répondu à un questionnaire auto-rapporté. Pourquoi ce seuil d’âge ? Car une littérature abondante suggère que dès l’âge de 45 ans, les travailleurs risquent d’être la cible de comportements et de manifestations d’attitudes âgistes.

Une femme aux longs cheveux gris penchés sur un bureau, crayon à la main
Dès l’âge de 45 ans, les travailleurs risquent d’être la cible de comportements et de manifestations d’attitudes âgistes.
(Unsplash), CC BY

Des 455 participantes, la majorité (55 %) était âgée de 45 à 54 ans, et plus d’un tiers détenaient une formation universitaire. En outre, 88 % de ces femmes se disaient en « bonne » ou « très bonne » santé, physique et mentale. Les quatre secteurs de travail les plus représentés dans l’échantillon étaient l’éducation (28,3 %), la santé (19,4 %), les ventes et services (19,2 %) ainsi que l’administration (80 %). Enfin, la majorité des participantes (58 %) travaillaient dans le secteur public.

Travail valorisant et motivation intrinsèque : un duo gagnant

La majorité des répondantes (84 %) se disent satisfaites ou très satisfaites de leur emploi, surtout lorsqu’elles sont motivées par des raisons personnelles ou sociales : sentiment d’accomplissement, contribution à une mission, défis stimulants.

À l’inverse, celles qui mentionnent la rémunération comme motivation principale se déclarent généralement moins satisfaites. Une tendance qui s’aligne avec la théorie de l’auto-détermination : les motivations extrinsèques, comme l’argent, ne suffisent pas à combler les besoins fondamentaux d’autonomie, de compétence et de lien social.

L’âgisme et le sexisme

Bien que la majorité des participantes soient globalement satisfaites de leur emploi, 27 % d’entre elles qualifient le marché du travail d’âgiste et/ou sexiste envers les travailleuses plus âgées, et près de 20 % évoquent des obstacles concrets. Voici quelques-uns de leurs commentaires :

Dans mon milieu, il y a définitivement un changement face aux femmes de 50 ans et plus. J’ai vu une attitude âgiste chez les hommes qui sont en position d’autorité.

La stigmatisation liée au fait d’être une femme affecte la façon dont mes collègues la perçoivent dans une certaine mesure.

Dur, car l’âge ne joue pas en notre faveur. Le choix est restreint, malgré l’expérience et la maturité, c’est encore un monde où des hommes de 45 ans ont plus de chance d’obtenir des postes de cadre.

Cette perception de discrimination, fondée sur l’âge et/ou le genre, s’exprime aussi sous la forme d’une fracture générationnelle : les travailleuses plus âgées se sentent désavantagées et expriment leur frustration en comparant leur situation à celle des plus jeunes, que ce soit pour les façons de faire au travail ou encore pour les conditions de recherche d’emploi.

Les travailleuses plus âgées se sentent désavantagées et expriment leur frustration en comparant leur situation à celle des plus jeunes.
(Vitaly Gariev sur Unsplash), CC BY

Voici certains témoignages de participantes :

Nous sommes en constante compétition. Les employeurs ne veulent pas prendre de risque d’engager une femme de plus de 45 ans. Et la nouvelle génération est très différente.

Très honnêtement, je pense qu’il est difficile pour une femme de cet âge de réintégrer le marché du travail après une perte d’emploi.

Les retombées de la discrimination fondée sur l’âge

Les résultats de l’étude montrent aussi que les participantes qui se sentent victimes de l’âgisme éprouvent une moins grande satisfaction au travail. Elles sont aussi plus nombreuses à envisager un départ à la retraite à court terme, c’est-à-dire au cours de la prochaine année, par comparaison avec celles qui n’éprouvent pas ce sentiment (soit 12,7 % pour les premières et 6,1 % pour les secondes).

Plus encore, les résultats montrent un lien significatif entre le ressenti d’âgisme et la perception de relations plus difficiles, plus tendues avec les gestionnaires, particulièrement avec les plus jeunes. « Il y a beaucoup de micro-gestion, des enjeux de communication, peu d’écoute et de reconnaissance de notre expérience », nous a dit l’une des participantes.


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Enfin, lorsqu’elles sont questionnées sur l’importance de la transmission de leurs connaissances aux plus jeunes travailleurs, la majorité répond par l’affirmative (72 %). Toutefois, celles qui se perçoivent victimes de l’âgisme témoignent du même coup d’un certain manque de réceptivité des plus jeunes travailleurs à l’égard de ces connaissances ainsi que d’une dévalorisation de leur expérience par l’employeur.

Repenser la culture du travail

Dans l’ensemble, ces résultats, même à partir d’un échantillon restreint, corroborent de nombreuses études montrant la persistance de l’âgisme au travail, doublée, pour les femmes, des stéréotypes de genre, en dépit de leur expérience. Cette réalité dépeinte par ces femmes, on peut le présumer, pèse sur leurs décisions d’interrompre malgré elles leur carrière.

Une femme aux cheveux gris coupés courts assise devant un ordinateur, un crayon à la main
La persistance de l’âgisme au travail, doublée, pour les femmes, des stéréotypes de genre, en dépit de leur expérience, teintent la carrière des femmes.
(Unsplash), CC BY

L’âgisme ciblant les travailleuses d’expérience demeure un phénomène sous-estimé. Ses conséquences sur le bien-être de ces travailleuses, comme pour la santé des organisations n’en sont pas moins négatives. Or si l’on veut réellement reconnaître la contribution de ces femmes, il est urgent de repenser la culture de nos environnements de travail dans un esprit d’inclusion et d’équité.

Le point de départ pour ce faire n’est autre qu’une prise de conscience, de la part des employeurs comme des travailleurs, de la prévalence des préjugés âgistes et sexistes, et des pratiques discriminatoires qui peuvent en découler.

La Conversation Canada

Martine Lagacé a reçu un financement du Comité consultatif pour les travailleuses et travailleurs de 45 ans et plus pour effectuer cette étude.

ref. Âgisme et sexisme : dès l’âge de 45 ans, les femmes sont victimes de préjugés sur le marché du travail, selon une étude – https://theconversation.com/agisme-et-sexisme-des-lage-de-45-ans-les-femmes-sont-victimes-de-prejuges-sur-le-marche-du-travail-selon-une-etude-252973

La aventura de divulgar ciencia ‘al otro lado del río’

Source: The Conversation – (in Spanish) – By The Conversation España, Editor

Los 70 alumnos y alumnas que han participado en la cuarta edición del Curso de verano de The Conversation ‘La aventura de divulga ciencia en español con éxito’ en el Palacio de la Magdalena (UIMP) con autoridades, ponentes y Jorge Drexler como invitado de honor. UIMP, CC BY

“Clavo mi remo en el agua, llevo tu remo en el mío / Creo que he visto una luz, al otro lado del río.”

Jorge Drexler, “Al otro lado del río”

Con esos versos –entonados a capela por Jorge Drexler ante un aula entregada– se produjo uno de los momentos más conmovedores del curso La aventura de divulgar ciencia en español con éxito, celebrado del 9 al 11 de julio en el Palacio de la Magdalena de Santander. La sede veraniega de la Universidad Internacional Menéndez Pelayo (UIMP) se convirtió durante tres días en un laboratorio de ideas, gracias a una iniciativa impulsada por The Conversation España, con el respaldo de la Fundación Lilly y la Fundación Ramón Areces.

Lo que allí se vivió fue mucho más que una serie de conferencias y talleres: fue un contagio de conocimiento y entusiasmo por la vida y la ciencia.

Mesa de inauguración del curso
La inauguración corrió a cargo del vicerrector del Campus de Las Llamas de la UIMP Francisco Matorras; Rafael Sarralde, el director general de The Conversation; Manuel Guzmán, Gerente en Fundación Lilly; Carolina Pola, colaboradora del comité científico de la Fundación Ramón Areces, y las codirectoras del curso Elena Sanz y Lorena Sánchez.
UIMP, CC BY

Lenguaje, cerebro y música: la mente en escena

Uno de los momentos más inspiradores fue el encuentro entre el neurofisiólogo y popular divulgador Xurxo Mariño y el músico y médico de formación Jorge Drexler. A medio camino entre el concierto y la charla científica, ambos desplegaron una conversación fascinante sobre cómo emerge la mente humana.

“El oficio del artista consiste en implantar una parte de su mente en otras personas”, explicó Mariño. “No se puede gozar de Beethoven sin ser un poco Beethoven”, respondía Drexler.

“La creatividad ocurre cuando disminuye la actividad de la corteza prefrontal: se apaga el director de orquesta del cerebro y se abren otras conexiones”, decía Xurxo Mariño. Y puso como ejemplo un momento muy concreto: el instante nada más despertar. Drexler, entonces, cantó con ayuda del público la canción que le valió un Óscar en el año 2005, nacida en un estado de duermevela. “Escribí Al otro lado del río a la luz de la mesita de noche”, confesaba.

Genes, mutaciones y el futuro humano

La genetista y catedrática de la Universidad de Barcelona, Gemma Marfany, arrancó la charla inaugural del curso con una afirmación contundente: “El genoma es una máquina perfecta, pero tiene errores”.

La genetista Gemma Marfany
La genetista Gemma Marfany durante una apasionada conversación en Caballerizas, lugar de encuentro de los ponentes en el Palacio de la Magdalena.
The Conversation, CC BY

Gemma Marfany habló de mutaciones, de edición genética con CRISPR –“el bisturí con GPS”– y de los dilemas éticos de la selección genética, que permitirá resolver múltiples enfermedades, pero también rediseñar nuestra especie.

“No queremos ser inmortales, queremos ser eternamente jóvenes”, sentenció, en referencia al sueño (o pesadilla) de modificar el ADN humano para mejorar el cuerpo, la mente y, quizá, el destino.

Con ejemplos como la película Gattaca o la historia de Carlos II el Hechizado, un rey que sufrió la maldición de la endogamia de la Casa de Habsburgo, Marfany dejó claro que la genética explica el pasado y condiciona el porvenir: “si modificas tu ADN, estás cambiando el ADN del futuro”.

Océanos, cosmos y física cuántica: lo que aún no sabemos

En una jornada dedicada a los grandes enigmas de la ciencia, la oceanógrafa Núria Casacuberta Arola habló del mar como “el corazón del clima”, advirtiendo que en lo profundo del océano hay más incógnitas que certezas. “Ha habido más personas en la Luna que en la fosa de las Marianas”, recordó Casacuberta Arola, subrayando el desconocimiento sobre el agua que regula la vida en la Tierra.

Nuria Casacuberta haciendo una exposición
Nuria Casacuberta Arola ha sido galardonada con la Beca de Retorno de la Fundación Ramón Areces, gracias a la cual trasladará sus actividades científicas al Institut de Ciències del Mar (ICM-CSIC) en Barcelona. La oceanógrafa propuso en el curso un viaje espacial al fondo de los océanos.
The Conversation, CC BY

El astrofísico David Galadí, profesor de la Universidad de Córdoba, y el físico cuántico Pablo Martínez Ruiz del Árbol, investigador del Instituto de Física de Cantabria, también colocaron al público ante el abismo de lo desconocido.

Pablo Martínez Ruiz del Árbol, investigador del Instituto de Física de Cantabria.
The Conversation, CC BY

Pablo Martínez comparó la física cuántica con el sushi: “para mi padre, que es de un pueblo de La Rioja, la cuántica es como el sushi, algo que te saca de tu zona de confort”. Y el astrofísico David Galadí, con humor y rigor, confesó que quizás en el futuro nos vean como “gente muy lista que llegó a conclusiones equivocadas”.

La ciencia, coincidieron ambos, solo puede actuar con humildad ante lo infinito por descubrir. Porque por cada conocimiento acumulado, “ampliamos lo que sabemos que no sabemos”, matizaba Martínez.

El astrofísico David Galadí describió la incertidumbre en astrofísica para explicar el universo.
The Conversation, CC BY

Corazón, medicina y mentoria: lecciones de una vida

El cardiólogo Valentín Fuster, una de las voces más esperadas, impartió una lección de sabiduría y humanidad en su conversación con la periodista experta en salud Cristina Sáez.

“Con franqueza, soy cardiólogo, pero no entiendo el corazón, un órgano que se mueve cada segundo y no se estropea hasta el final de una vida. He contribuido a entenderlo, pero aún no sabemos realmente cómo funciona: el corazón es un milagro”, confesó.

Valentín Fuster llegó desde Nueva York a Santander. ‘Si hago este viaje es porque considero esencial la divulgación de la ciencia’.
UIMP, CC BY

Valentín Fuster narró su trayectoria desde sus inicios, cuando su camino era el de un tenista profesional. “Un año suspendí una asignatura y mi padre puso fin al tenis. Siempre confié en mi padre. Y siempre he hecho lo que me han dicho las personas en las que he confiado”.

Así comenzó la carrera del hombre que introdujo en el mundo la medicina preventiva, que supo encontrar en el colesterol la razón de los infartos de miocardio, y que peleó contra gigantes hasta conseguir la polipíldora para tratar problemas de corazón. El estudio SECURE, publicado en The New England Journal of Medicine, mostró una disminución del 33 % en la mortalidad cardiovascular en comparación con el tratamiento habitual.

La periodista Cristina Sáez, coautora con Valentín Fuster de su libro de memorias, condujo la conversación.
UIMP, CC BY

Valentín Fuster habló de la importancia de tener un mentor, de la necesidad de cuidar al paciente como un todo –físico y emocional– y de los peligros de una sociedad que promueve el consumo hasta enfermarnos.

Para él, la clave para una vida íntegra está en lo que llama las “cuatro T”: tiempo para reflexionar, talento cultivado con humildad, transmitir positividad y ser un tutor para los demás.

Cristina Saéz mencionó el altruismo de Valentín Fuster en el trato a pacientes de toda condición social: “Para mí no existen nombres, existen personas, porque si miras por dentro, todos somos iguales”, dijo Fuster.

Pero el corazón no es solo un órgano que late: es un icono universal del amor. Y de amor habló el psicólogo y divulgador Luis Muiño, uno de los conductores de Entiende tu mente, el pódcast en español sobre psicología más escuchado del mundo. Muiño narró, por ejemplo, la historia del matrimonio mudo chino. Mudo, porque durante 60 años no se dirigieron la palabra. Entonces alguien les preguntó por qué seguían juntos. Él respondió: “porque la amo”. Y ella: “porque sé lo que piensa”. Luis Muiño abrió un intenso y apasionado debate con el alumnado planteando preguntas como: ¿por qué nos atrae lo prohibido? ¿Qué podemos hacer los ciudadanos del siglo XXI con las hormonas del Paleolítico? ¿Por qué vemos lo que queremos ver cuando amamos?

Luis Muiño desgranando la ciencia del amor.
The Conversation, CC BY

Ciencia con alma

El curso se nutrió de expertos, pero también de historias humanas. Como la de una alumna que recordó a su madre con alzhéimer, que solo conecta con el presente cuando canta canciones del pasado, “y entonces se emociona”. O la de otra alumna que trabaja como intérprete en contextos extremos, por ejemplo, cuando a alguien le detienen en un país en conflicto y no habla el idioma. Ella trataba de buscar una metáfora para definir su papel, algo que le pedía Emilio José García, responsable de la unidad de cultura científica del Instituto Astrofísico de Andalucía (IAA) al frente del taller Cómo hacer una charla de divulgación que no se olvide. La alumna buscaba una metáfora para definirse y alguien del publico propuso: “sois ángeles”.

Emilio José García (IAA) ofreciendo las claves para una charla de divulgación que no se olvide.
The Conversation, CC BY

También pidió metáforas Estrella Montolío, catedrática de la Universitat de Barcelona, para su taller sobre la ciencia del lenguaje aplicada a la divulgación. Entre las que escribieron los alumnos está: “Los alimentos transgénicos son como Severus Snape, señalados como perversos y malvados, pero en realidad ambos están protegiendo a las personas”.

Estrella Montolío, catedrática de Lengua Española de la Universidad de Barcelona, recogió metáforas científicas en su taller sobre la ciencia del lenguaje aplicada a la divulgación.
The Conversation, CC BY

Herramientas para divulgar

En el curso se entregó al alumnado el libro Comunicando ciencia con ciencia. Promovido por la Fundación Lilly, ha sido elaborado por 36 coautores expertos en comunicación científica.

Marcos Pérez, director de los Museos Científicos de A Coruña y presidente de la Asociación Española de Comunicación Científica (AEC2), Cristina Rico, coordinadora Senior de Programas y Actividades en Fundación Lilly, y Elena Sanz, directora de The Conversation, presentaron el libro Comunicando ciencia con ciencia.
The Conversation, CC BY

Las caras de asombro con mayúscula, y exclamaciones consecutivas, se produjeron durante el taller de uso de inteligencia artificial para divulgar ciencia que impartió Carmen Torrijos, lingüista computacional de Progidioso Volcán. En apenas dos horas, como prometió, hicimos un artículo, gráficos, un pódcast y una presentación en PowerPoint sobre la situación de Isla Calima, un archipiélago inexistente, que Carmen Torrijos presentaba amenazado por el cambio climático, y que sirvió como ejemplo para experimentar lo que las inteligencias artificiales generativas son capaces de hacer.

Carmen Torrijos mostró herramientas de inteligencia artificial aplicables a la divulgación de ciencia.
The Conversation, CC BY

Durante tres días, el curso fue una constelación de voces, ciencia y emociones. Una muestra de que la divulgación científica en español puede ser, además de rigurosa, profundamente humana.

Las codirectoras del curso Elena Sanz y Lorena Sánchez, con Xurxo Mariño y Jorge Drexler en el punto y final de La aventura de divulgar ciencia.
The Conversation, CC BY

The Conversation

ref. La aventura de divulgar ciencia ‘al otro lado del río’ – https://theconversation.com/la-aventura-de-divulgar-ciencia-al-otro-lado-del-rio-261122