My very first paper has just been published in Nature Human Behaviour! In it, we demonstrate that both a chatbot and a more traditional pedagogical intervention can help improve adolescents' knowledge of vaccines and their attitudes towards vaccination.

Ever wanted to read about an old problem almost nobody cares about anymore? Well, I wrote about it. 🧵

#HBES2026 abstract submissions are live! More exciting details to come soon. Arrive early for @ces2026.bsky.social @humbehevosoc.bsky.social

📢 Apply to our (2-year) research fellowships at @iast.fr Join a multidisciplinary, interdisciplinary, transdisciplinary, and indisciplinary group of scholars in Toulouse, walkable/cyclable pink city of chocolatines in the South of France. Deadline: November 15, 2025. www.iast.fr/research-fel...

"From this point of view, fairness really may be a universal law."

the functional form of moral judgment is (sometimes) the nash bargaining solution new preprint👇

We often hear from reviewers: "what about demand effects?" So we developed a method to eliminate them. Something weird happened during testing: We couldn’t detect demand effects in the first place! (1/8)

1/ Thrilled to share that my main PhD article has just been published in Nature Human Behaviour! 🎉 👉 “A randomised controlled trial on the effect of administrative burden and information costs on social inequalities in early childcare access in France” rdcu.be/eFAEA

I'm giving a free book talk next Wednesday at the Harvard Museum of Natural History. Come by if you're in the Boston area!

👏 Huge congrats to @audeber.bsky.social, group leader and head of our Molecular Diversity of Microbes lab, on being named a 2025 Vallee Scholar! Her pioneering work on ancestral immunity opens new perspectives for biomedical innovation. 🔬🌍 @valleefoundation.bsky.social #Science #Immunity

Why do societies reliably develop strikingly similar traditions like dance songs, hero stories, shamanism & justice institutions? In a new BBS target article, I propose a theory for such "super-attractors" + cultural evolution more broadly. Now open for commentary: www.cambridge.org/core/journal...

This week, we discuss the evolution of cooperation with Pat Barclay. youtu.be/-cHqagwF1yY?... podcasts.apple.com/us/podcast/e... www.podbean.com/eas/pb-f5gtf...

Very excited to see this published!

Our new paper is out in PNAS: "Evolving general cooperation with a Bayesian theory of mind"! Humans are the ultimate cooperators. We coordinate on a scale and scope no other species (nor AI) can match. What makes this possible? 🧵 www.pnas.org/doi/10.1073/...

Arthur has written a wonderful, clear, super helpful introduction to contractualism as a foundation for moral psychology. Perfect for getting up to speed, teaching, a desk reference, or a sunny day at the beach. wires.onlinelibrary.wiley.com/doi/10.1002/...

So pleased to have won this award. Thank you @ceciliapad.bsky.social @gregoryfiorio.bsky.social @ruthmace.bsky.social @humbehevosoc.bsky.social

Our paper on the logic of guesses is now out! We provide a new information-theoretic perspective on many phenomena (old and new) in judgment under uncertainty. 🧵

🚨 Now out in Nature Human Behaviour 🚨 We show that following the news on WhatsApp or Instagram (N = 3,395 🇫🇷🇩🇪) increases current affairs knowledge, participants’ ability to discern true from false news stories, awareness of true news stories, as well as trust in the news. doi.org/10.1038/s415...

The winners of the HBES Margo Wilson Award (best paper in E&HB the previous year) are Olympia Campbell, Cecilia Padilla-Iglesias, Gregory Fiorio, & Ruth Mace for the paper “Genetic markers of cousin marriage and honour cultures”. Congratulations! doi.org/10.1016/j.ev...

#HBES2026 will be a joint meeting with the Cultural Evolution Society in Rabat, Morocco: CES is May 11-13, HBES is May 13-16, with one day of planned overlap. It’ll be a great chance for cross-pollination between the two evolutionary societies. Come for one conference, stay for both!

We often have to judge who is knowledgeable—precisely when we are not. Can humans really do that? Our new paper in Psychological Science shows that, surprisingly, we can. drive.google.com/file/d/1b15E...

This is a great opportunity to work with @yohm.bsky.social, one of the leading researchers in evolutionary game theory these days. 🙂 I can only recommend applying ⬇️

An incredible opportunity! 📰🎉 Join our research group exploring social questions, work with an amazing supervisor, and live in Japan for a few years while you're at it! 🇯🇵🍜

📢 We’re hiring! RIKEN iTHEMS has launched a new Mathematical Social Science Team, and we’re looking for researchers to join us. If you're into cooperation, norms, or networks, check out the call! 🔗 www.riken.jp/en/careers/r... Feel free to DM me if you have questions!

Out today!

📢 Research Assistant (Quant Soc/Data Science) – 4-month full-time contract Join an interdisciplinary project @cris-sciencespo.bsky.social on reducing early childhood inequalities. 🤩 📍 Paris 🗓️ Sept–Dec 2025 💰 ~€2500/month + benefits Apply by June 15! More details 🔽 drive.google.com/file/d/1_mQH...

🎙️We’re thrilled to introduce our #ZPLS Keynote Speaker: @sachaltay.bsky.social! Join us as he presents “Rethinking the Problem of Misinformation” — a fresh perspective at the intersection of Psychology and Law, on May 22nd‼️registration: celleuven.wixsite.com/home/zpls/z-...

Excited to speak about some new work on Bayesian Cooperation at this workshop! Join us virtually

We easily take the way our society works for granted. However, it only relies on what's in our minds: our shared expectations about each other's behaviour. What’s happening in the US illustrates how the norms on which social order rests can erode and break down.

New paper from @lfitouchi.bsky.social: Why do people moralize harmless bodily pleasures? www.sciencedirect.com/science/arti...

🧵New paper out in Cognition Why do people moralize harmless carnal sins (e.g. gluttony, masturbation)? @danielnettle.bsky.social & I find that these behaviors activate reciprocity-based moral judgment—no need for a distinct "purity" module. 50 days free link: authors.elsevier.com/a/1l18D2Hx2-...

I am really happy to share information about the 2nd Workshop on Modeling and Applications of Evolutionary Game Theory, which will be held virtually on Thursday, May 8, and Friday, May 9. sites.google.com/view/2nd-evo... I enjoyed organizing this workshop with Olivia Chu and Alex McAvoy.

"What goes on four feet in the morning, two feet at midday, and three feet in the evening?" This riddle is thousands of years old, but why does it stick with us? In our new paper, we argue that the feeling of insight might explain the lasting success of some cultural products: tinyurl.com/4j756h9a

🔥🔥🔥🔥🔥 www.sciencedirect.com/science/arti...

LSE's @eapower.bsky.social is seeking a postdoc to model the impacts of social networks and reputation on inequality. Very cool opportunity. jobs.lse.ac.uk/Vacancies/W/...

🚨New WP🚨 Problem: Altruism alone isn't enough to sufficiently invest in future generations. We find: Allowing for cooperation with both the previous generation (as well as the future generation) increases investment in future generations. papers.ssrn.com/sol3/papers....

Some personal news: In April, I will be joining the University of St Andrews as a lecturer @standrewspsyneuro.bsky.social (~assistant professor for non-UK folks). I work on cooperation, institutional legitimacy, and personality. If you're in the area and share some interests, I'd love to chat.

From Tetris to Zelda, to Elden Ring and League of Legends… our new paper with @valerian-chambon.bsky.social, published in Entertainment Comuting delves into the diversity of video games and gamers' preferences 🎮. We present a cognitive framework for understanding this diversity. ⬇️

Call for 5-years research fellowships at PSL university! @psl-univ.bsky.social Join the CultureLab team to research computational social science. www.dropbox.com/scl/fi/o5mkp...

So happy to see this out! The paper is really nice to read - it's @acerbialberto.com who did the writing and it shows. I've mostly done the maths. It's the first time, for me, that I can show everything analytically in a model. It feels great. A few maths details 👇

Are you interested in cultural transmission, medieval manuscripts or digital humanities, and want to pursue a PhD in a city bustling with intellectual and cultural life ? Come work with us !

🎉 I'm excited to share that 2 of our papers got accepted to #RLDM2025! 📄 NORMARL: A multi-agent RL framework for adaptive social norms & sustainability. 📄 Selective Attention: When attention helps vs. hinders learning under uncertainty. Grateful to my amazing co-authors! *-*

Does the culture you grow up in shape the way you see the world? In a new Psych Review paper, @chazfirestone.bsky.social & I tackle this centuries-old question using the Müller-Lyer illusion as a case study. Come think through one of history's mysteries with us🧵(1/13):

A couple of news pieces on my recent paper on institutions, and understanding them as tools for solving cooperation challenges: 🔗 ENS: tinyurl.com/ENS-DEC 🔗 CNRS (in French): tinyurl.com/Instit-CNRS Full thread below 👇

Does costly punishment—paying a cost to reduce an opponent's payoff—help sustain cooperation in indirect reciprocity? Punishment is often seen as a powerful tool, but its effectiveness here is debated. Our new study explores this: sciencedirect.com/science/arti... 🧵

Nobel prize winner Katelyn Karikó has spent endless hours to gain unprecedented insights into nature. But she also enjoys the feelings of insight triggered by watching Columbo. Are there people who just enjoy feelings of insights more, whatever their source? Our recent findings suggest that yes:

Eugenics, statistical hubris, and unknowable unknowns in human genetics www.wiringthebrain.com/2025/01/euge...

Juliette Hubert et moi présentons les avancées du projet d'approche lexicométrique du rap français demain 15h à l'EHESS, dans le séminaire "Approches pluridisciplinaires du rap", si ça vous intéresse ! ehess.modelisationsavoirs.fr/rap/rap24-25/r

Looking for a light read during the holidays?🎄 Let me tell you about our new publication with Vince Knight & @marcharper.bsky.social on the properties of strategies in computer tournaments for the Iterated Prisoner’s Dilemma (IPD) 🧵 journals.plos.org/ploscompbiol...