A historian and political scientist, he is a senior researcher in the French National Centre for Scientific Research (CNRS) and the École des Hautes Études en Sciences Sociales (EHESS). Prior to this, he was a research professor at the Institute of Political Studies of Paris (Sciences Po). He is the author of Le Califat imaginaire d’Ahmad Al-Mansur (2009), Les Clercs de l’islam. Autorité religieuse et pouvoir politique en Arabie saoudite (2011), Le Califat. Histoire politique de l’islam (2016) and Islams politiques : courants, doctrines et idéologies (2017, with Sabrina Mervin).
