The Internationalist Socialist Workers' Party ( es, Partido Obrero Socialista Internacionalista, POSI) is a Spanish political party of

trotskyist Trotskyism is the political ideology and branch of Marxism developed by Ukrainian-Russian revolutionary Leon Trotsky and some other members of the Left Opposition and Fourth International. Trotsky self-identified as an orthodox Marxist, a rev ...

ideology founded in 1980. It is a member of the

Fourth International (ICR) The Fourth International (identified here by its major theoretical magazine "La Verite") was established as an "International Centre (or Center) of Reconstruction" by co-thinkers of Pierre Lambert, in 1981 who argued that the post-war political ...

References

1980 establishments in Spain Communist parties in Spain Fourth International (ICR) Political parties established in 1980 Political parties in Spain Trotskyist organisations in Spain {{Spain-party-stub