Socialist Party (France)
In 1899, the participation of Millerand in Pierre Waldeck-Rousseau's cabinet caused a debate about socialist participation in a "bourgeois government". Three years later, Jaurès, Allemane and the possibilists founded the French Socialist Party while Guesde and Vaillant formed the Socialist Party of France. Then, in 1905, during the Globe Congress, the two groups merged in the French Section of the Workers International (Section française de l'Internationale ouvrière or SFIO). Jaurès became the party leader.