Bernard-Henri Lévy publishes two works simultaneously : De la guerre en philosophie, the text of a lecture given at the Ecole Normale Supérieure on April 6, 2009, and Pièces d’identité, a collection of essays, returning, in particular, to his theoretical discourses on Jewish thought.
He resigns from the supervisory board of Libération and joins that of Le Monde, where he represents Xavier Niel, new majority shareholder of the evening daily. He launches an international campaign in favor or Sakineh Mohammadi Ashtiani.
During the entire year 2011, Bernard-Henri Lévy devotes most of his time and energy to the war in Libya. In October, he publishes La Guerre sans l’aimer, a precise, factual and literary diary account, inspired by his actions during the war.
He finishes Le Serment de Tobrouk (The Oath of Tobruk), a film about his action in Libya, most of it shot in the field during the events, to be presented at the Cannes Film Festival. The film is co-directed by Marc Roussel, with Gilles Hertzog ; and produced by par François Margolin. Bernard-Henri Lévy calls for the French to vote for François Hollande.