The Workers and Peasants' Socialist Party (''Parti socialiste ouvrier et paysan'', ''PSOP'') was a

socialist Socialism is an economic ideology, economic and political philosophy encompassing diverse Economic system, economic and social systems characterised by social ownership of the means of production, as opposed to private ownership. It describes ...

organisation in

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

, formed on June 8, 1938, by Marceau Pivert. Its youth wing was the ''Workers and Peasants' Socialist Youth'' (''Jeunesses Socialistes Ouvrières et Paysannes'' – JSOP). It developed out of a

left-wing Left-wing politics describes the range of Ideology#Political ideologies, political ideologies that support and seek to achieve social equality and egalitarianism, often in opposition to social hierarchy either as a whole or of certain social ...

faction that was expelled from the '' Section Française de l'Internationale Ouvrière'' (SFIO), and named itself ''Gauche Révolutionnaire'' ("Revolutionary Left"). Alongside moderate Marxists, the party grouped Trotskyists (as an outcome of the French Turn) and Luxemburgists (such as René Lefeuvre). Another well-known leader beside Pivert was Daniel Guérin, a figure of Libertarian Socialism. Internationally, PSOP was an affiliate of the London Bureau of left-wing socialist parties, which also included the British

Independent Labour Party The Independent Labour Party (ILP) was a British political party of the left, established in 1893 at a conference in Bradford, after local and national dissatisfaction with the Liberal Party (UK), Liberals' apparent reluctance to endorse work ...

and the Spanish Workers' Party of Marxist Unification (POUM). Appealing to a minority dissatisfied with both the SFIO and the French Communist Party (PCF), PSOP was a revolutionary socialist party, and had between 8,000 and 10,000 members. It edited the paper ''Juin 36'', named in memory of the 1936 general strike that caused the split between Pivert and the Popular Front government. In 1939 a small Trotskyist faction split away from the PSOP, establishing the Trotskyist Group, now known as Workers' Struggle (''Lutte Ouvrière''). The PSOP collapsed at the beginning of

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

, when it was outlawed by the Vichy regime. Most of its former members joined the

French Resistance The French Resistance ( ) was a collection of groups that fought the German military administration in occupied France during World War II, Nazi occupation and the Collaboration with Nazi Germany and Fascist Italy#France, collaborationist Vic ...

, in groups affiliated with either the SFIO or the PCF or in ''L'Insurgé'', an independent group around Lyon.

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1938 establishments in France 1940 disestablishments in France Defunct political parties in France International Revolutionary Marxist Centre Political parties disestablished in 1940 Political parties established in 1938 Political parties of the French Third Republic Right Opposition Socialist parties in France Trotskyist organizations in France Trotskyist parties {{France-party-stub