The Epinay Congress was the third national congress of the French Socialist Party (Parti socialiste or PS), which took place on 11, 12 and 13 June 1971, in the town of Épinay-sur-Seine. During this congress, not only did the party admit the Convention of Republican Institutions (Convention des institutions républicaines or CIR, a rally of left-wing republican groups led by François Mitterrand) into its ranks, but the party leadership was also won by the new entrants. The Socialist Party (French: Parti Socialiste or PS) is the main opposition party in France. ... Épinay-sur-Seine is a town and commune of France, in the northern suburbs of Paris. ...   IPA: (October 26, 1916 – January 8, 1996) was President of France from 1981 to 1995, elected as representative of the Socialist Party (PS). ...

Since 1969, Alain Savary was first secretary of the party, with the support of Guy Mollet, the former leader of the socialist party SFIO. Savary began an "ideological dialogue" with the French Communist Party. This dialogue was seen as a paving of the way towards an eventual election-time coalition with the Communists. This article or section does not cite its references or sources. ... Guy Mollet (31 December 1905 - 3 October 1975), French politician, was born in Flers, in Normandy, the son of a textile worker. ... Sfio, or Safe/Fast I/O, is an I/O library developed by AT&T Research, with several improvements over the ANSI C stdio library. ... This does not cite its references or sources. ...

Savary faced two oppositing platforms. The right-wing led by Pierre Mauroy and Gaston Defferre, who were wary of this strategy, and the left-wing led by Jean-Pierre Chevènement, who wanted to accelerate the process of an alliance with the Communist Party. Pierre Mauroy, French politician Pierre Mauroy (born July 5, 1928) is a French Socialist politician. ... Gaston Defferre (September 14, 1910 - May 7, 1986, Marseille) was a French socialist politician. ... Jean-Pierre Chevènement Jean-Pierre Chevènement (born March 9, 1939 in Belfort) is a French politician. ... This does not cite its references or sources. ...

Mitterrand and the CIR, which joined the PS in Epinay, advocated immediate negotiations with the Communist Party in order to write a common election programme.

The will to overthrow Mollet's group from the leadership of the party permitted the birth of an assorted coalition with Mitterrand, Defferre, Mauroy and Chevènement. It obtained 51.3% against 48.7% for Savary and Mollet. This congress was described as a premeditated plot, prepared by Mitterrand, Mauroy, Defferre and Chevènement beforehand.

Mitterrand became the new PS first secretary and in the following year signed the Common Programme with the Communist Party and the Movement of the Radical-Socialist Left. The Left Radical Party (Parti Radical de Gauche or PRG) is a minor French centre-left, social-liberal party with moderate views, formed in 1972 by a split from the Radical Republicans and Radical Socialists Party, once the dominant party of the French left. ...

Mitterrand conquered the party with a very radical speech, a strategy often used in French socialist congresses:

"Reform or revolution? I feel like saying, yes, revolution [...] Violent or peaceful, a revolution is first of all a break [...] Whoever does not want the break with the established order [...] with capitalist society, cannot be a member of the Socialist Party".

His project to ally with the Communist Party in order to replace it as main left-wing party became obvious when he said, during the congress:

"I think this is not normal: that 5 millions Frenchwomen and Frenchmen choose the Communist Party".

References

• Franz-Olivier Giesbert, Mitterrand, Seuil, 1996
• www.centenaire.parti-socialiste.fr