French Section of the Workers' International

The French Section of the Workers' International (SFIO) was a French socialist party founded in 1905 and dissolved in 1969, when it was reorganized as the modern Socialist Party.

French Workers' Party: A Marxist political party founded in France in 1882 by Jules Guesde and Paul Lafargue. Its Marxist current became one of the major organizations brought together in 1905.
French Section of the Workers' International parliamentary group: The elected deputies who represented the SFIO in the French Parliament. The parliamentary group translated party positions into legislative action.
Léon Blum: A French socialist politician who led the Popular Front government and the SFIO in the 1930s. His premiership made the party's capacity for governing a defining issue.
French Communist Party: A French communist party founded in 1920 after most SFIO delegates voted to join the Communist International. It inherited the SFIO's revolutionary majority after the Tours split.
French Socialist Party (1902): A French socialist organization formed in 1902 around Jean Jaurès and other reformist socialists. Its reformist current joined the French Workers' Party in creating the SFIO.
French Section of the Workers' International congresses: National meetings where the SFIO debated policy, elected leaders, and set party direction. Congress decisions mediated recurring disputes over strategy and leadership.
Guy Mollet: A French socialist politician who led the SFIO from 1946 to 1969. His long leadership shaped the party's postwar identity and its final years.
Radical Party (France): A French republican and secular party founded in 1901, traditionally positioned between the left and center. The SFIO debated whether cooperation with this non-socialist party compromised class independence.
Jules Guesde: A French Marxist politician who helped found the French Workers' Party and later led the SFIO's left wing. He represented the Marxist current that resisted collaboration with bourgeois parties.
SFIO and the Sacred Union: The SFIO's support for national unity and the French war effort during World War I. The 1914 choice tested its internationalist principles and reshaped internal divisions.

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