Blanchot's political activities after the war shifted to the left. He is widely credited with being one of the main authors of the important "Manifesto of the 121", named after the number of its signatories, who included Jean-Paul Sartre, Robert Antelme, Alain Robbe-Grillet, Marguerite Duras, René Char, Henri Lefebvre, Alain Resnais, Simone Signoret and others, which supported the rights of conscripts to refuse to serve in the colonial war in Algeria. The manifesto was crucial to the intellectual response to the war.