Patrick Weil is a French political scientist and historian who serves as a senior research fellow at the CNRS (Centre National de la Recherche Scientifique) at the Centre for the Social History of the 20th Century. He is also a professor at Yale Law School, where he teaches courses related to constitutional law, immigration, and citizenship. Weil's research focuses on immigration policy, citizenship, secularism, and national identity, particularly in France and the United States. He has authored several influential books, including The Sovereign Citizen: Denaturalization and the Origins of the American Republic and How to Be French: Nationality in the Making since 1789. Weil's scholarship has significantly shaped public and academic debates about immigration, integration, and the legal and social frameworks of citizenship.