I’m a Research Professor at the University of Paris 1 Panthéon Sorbonne and a visiting scholar in law at Yale Law School.

In my work I have often explored the issues of citizenship and immigration laws and policies.

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Qu'est-ce qu'un Français? Histoire de la nationalité française de la Révolution à nos jours

How to Be French: Nationality in the Making since 1789

The Sovereign Citizen: Denaturalization and the Origins of the American Republic

Le Sens de la République