PCP had its origins in the Estat Català-Partit Proletari, founded in 1932.
[1] The goal of PCP was the creation of a Catalan Socialist Republic.
[1] In 1936 Peres Aznar, a PCP deputy in the Cortes, was elected president of CADCI.
Its youth wing was known as Joventuts del Partit Català Proletari.
[2] In 1936 PCP merged with other groups to form the Unified Socialist Party of Catalonia.