Editor-­in­-chief of Art Press magazine from 1991 to 1999, he also hosted two contemporary art programmes on Arte (TV channel) between 2002 and 2006. He taught contemporary art at the University of Paris VIII from 1996 to 2003. The organiser of numerous exhibitions in France and abroad, he is also the author of several essays (L’Usage des ruines, L’Idiotie: art, vie, politique, Armand Silvestre, poète modique, Artistes sans œuvres, I would prefer not to). Since 2008, he has devoted himself to the cycle of conferences entitled L’Encyclopédie des guerres (The Encyclopaedia of Wars) held at the Pompidou Centre and the Comédie de Reims theatre.