In 1922 he founded the avant-garde periodical L'œuf dur (The Tough Egg) together with Philippe Soupault, François Gérard, Max Jacob, Louis Aragon and Blaise Cendrars.
From this point onwards, he and his wife participated in the life of the French Trotskyist extreme left and notably its publications.
He then organised attempts to create a Marxist left, devoid of Communist and Trotskyist trappings, through a publication called the Revue Internationale.
He remained loyal to this party in spite of his opposition to the "realists" (Gilles Martinet, Michel Rocard) and showed total rejection of François Mitterrand.
[citation needed] The laboratory of research in social sciences and management at the University of Évry Val d'Essonne bears his name.