Parti ouvrier français
Paul Brousse returned to France in 1880 and progressively became more reformist. He began to take part in the French Workers' Party (POF) and then, after a scission, to the Federation of the Socialist Workers of France (FTSF), which became known as the "possibilists". He voted at the 1896 international congress in London along with Jules Guesde for the expulsion of the "anti-authoritarian socialists", as were known the anarchists. The possibilists then joined Jean Jaurès's French Socialist Party in 1902, which fused with others movements in 1905 to create the French Section of the Workers' International (SFIO).