It was founded in 1974 as the radical Anti-Francoist Revolutionary Workers' Party of Spain (Partido Obrero Revolucionario de España (PORE)), a name that it kept up until 1983.

[1][2] The party was led by Aníbal Ramos (Arturo van den Eynde) for thirty years.

Its clandestine phase in Francoist Spain was characterized by ferocious persecution by the Spanish police and the arrest and torture of many of its members.

The extremism of this group by did not abate after the caudillo's death for PORE steadfastly opposed the Spanish transition to democracy which it saw as a mere continuation of Francoism.

This party keeps decentralized sections only in Catalonia, being part of Esquerra Unida i Alternativa (EUiA) as the Bastida faction.