Socialisme International (SI) was a small French revolutionary socialist organisation, founded in 1985 and publishing its magazine until 2009.
The people around Socialisme International have notably been active in recent years opposing the controversial ban on the wearing of Muslim headscarves in schools, (along with an alliance of Muslim and left organisations and individuals) and supporting the idea of a united radical Left candidate for the 2007 presidential elections.
Therefore, they sought to win other militants to their views prior to launching an independent group of their own and joined the Ligue Communiste Revolutionnaire (LCR) to further that aim.
During the 1990s, Tony Cliff, the leading theoretician in the British Socialist Workers Party encouraged Socialisme International to follow the successful[according to whom?]
example of Linksruck who entered the youth section of the SPD and grew substantially and join the French Socialist Party.