Grégoire Darcy

I am a PhD candidate in cognitive science at Institut Jean Nicod (ENS-PSL, EHESS, CNRS), supervised by Jean-Baptiste André and Nicolas Baumard.

My research focuses on preference formation — narrative, moral, and political — and on the representations we construct of others’ psychology (metarepresentations): I study how our perceptions of our fellow citizens’ cooperativeness are systematically biased. More broadly, I am interested in the emergence of moral and social norms — why some societies develop trust-based institutions while others rely on social control —, misinformation, and the interfaces between law, public policy, and cognitive science — for instance, where do our moral intuitions about the ownership of ideas come from, and why does our moral system balk at undisclosed use of LLMs.

I teach at the Master’s level at ENS-PSL, Sciences Po, Paris Dauphine, and Paris 1 Panthéon-Sorbonne, as well as at the EMSST and the École de Guerre - Terre, where senior officers of the French Army are trained. I have led consulting and expertise missions for several public institutions, and notably authored a Policy Brief on disinformation countermeasures for Institut Jean Nicod.

My book La désinformation is forthcoming on 4 June 2026 (Éditions La Découverte).

When I’m not doing research, I write plays and act in theatre, notably at the Théâtre de Poche-Montparnasse.

Co-authors