PSC–C was founded in 1976 as a continuation of Socialist Convergence of Catalonia (CSC).

It also unified with various sectors originating in Workers' Party of Marxist Unification (POUM), Unified Socialist Party of Catalonia (PSUC) and Republican Left of Catalonia (ERC).

Amongst its other leaders were Raimon Obiols, Narcís Serra and Pasqual Maragall, the former president of the Generalitat de Catalunya.

In the General Elections of 1977 PSC–C stood on joint lists with Spanish Socialist Workers' Party (PSOE) as Socialistes de Catalunya.

[2] PSC-C published L'Hora Socialista and Company.