not exactly fit into the orthodox Socialist Party or the Radical-Socialist Party. Between 1907 and 1935, socialist-republicans formed several loose parliamentary parties. They were periodically joined by splinters from the orthodox Socialist Party's right-wing. 1907 to 1911: the Independent Socialist Party, which in 1911 became the PSR; 1911 to 1935: the main Socialist Republican Party (PSR); 1919 to 1926: the Socialist Party of France, a splinter of the SFIO's reformist right-wing, which eventually merged into the PSR; 1928 to 1935: a new party named the Socialist Party of France, which splintered from the PSR; 1933 to 1935: the 'Jean Jaurès' French Socialist Party, another splinter of the SFIO's reformist right-wing. Component Parties of the Socialist Republican Union The Republican-Socialist Party (PRS) This was a parliamentary group formed in 1911 (and revived in 1923 after a brief disappearance) by non-Marxist socialists who declined to join the SFIO and who wished to remain close to the Radicals. It provided a political home to independents elected to parliament who for doctrinal, organisational or personal reasons could not or would not sit among the SFIO or the PRRRS. Consequently it was quite a diffuse organisation borrowing elements from both adjacent parties: some of its members were social-democrats close to the reformist right wing of the SFIO, and others were republicans who overlapped with the left-wing of the Radical-Socialists (and in some cases originally came from this party, as was the case for the Socialist Republican Party's own leader Maurice Viollette) . The party had provided several the major figures of the French republican left, including former premiers Aristide Briand and Réné Viviani. The French Socialist Party. This had originated as a splinter of the SFIO's reformist right-wing in 1919, which briefly merged with the Socialist Republican Party (1926–28) before disagreements over coalition partners prompted it to be revived as a semi-independent parliamentary grouping attached to the PSR). Its main figures were Maxence Bibié and Anatole de Monzie. The boundary between this party and the PRS was fluid, and many independents were simply elected as 'Socialist Republicans' and decided for themselves which of the two groups to sit with in parliament. The Socialist Party of France (PSdF), labelled the 'Jean Jaurès' Socialist Party by its members and the Neo-Socialists by others. This was founded in December 1933 by the veteran socialist leader Pierre Renaudel. The SFIO had a strict policy of non-participation as a minority