Communist Workers League (Spain)

The Communist Workers League (Spanish: Liga Comunista Obrera, LCO) was a Trotskyist political organization in Spain. It was founded in 1972 through the merger of two smaller groups: Liga Comunista (Communist League) and Organización Comunista del 4 de Agosto (Communist Organization of August 4th).

The LCO identified with the Fourth International (Unified Secretariat) and advocated for a socialist revolution in Spain. During the transition to democracy in the late 1970s, the LCO played a role in the workers' movement and participated in elections.

In 1979, the LCO merged with the Communist Movement (Spanish: Movimiento Comunista, MC) to form the party Communist Left (Spanish: Izquierda Comunista, IC). The merger aimed to consolidate the revolutionary left in Spain. However, the resulting IC proved unstable, and the former components eventually separated.

The LCO ceased to exist as an independent organization after the 1979 merger. Its historical significance lies in its role within the Spanish Trotskyist movement and its participation in the transition to democracy.