Marceau Pivert (2 October 1895, Montmachoux, Seine-et-Marne – 3 June 1958, Paris) was a French schoolteacher, trade unionist, socialist militant, and journalist.
Active in the Syndicat National des Instituteurs (SNI), a staunch supporter of laïcité and a pacifist after service in World War I, Pivert joined the faction of the French Section of the Workers' International (SFIO) led by Léon Blum, which opposed affiliation to the Comintern in 1920, as opposed to the new French Communist Party (PCF).
[clarification needed] Pivert then wrote his best-known article, published on 27 May, headlined Tout est possible!
In consequence, Pivert cut his links with the government, writing to Blum, "I will not accept capitulation in front of Capitalism and the banks".
In 1940, it was outlawed after the fall of France to Nazi Germany, on orders of Vichy French leader Philippe Pétain.