[1] Next year he was arrested for his participation in the opposition movement in Murcia against the dictatorship of Miguel Primo de Rivera.

[3] In the prison he met with Marcelino Domingo, Álvaro de Albornoz and Benito Artigas, with whom he established the Radical Socialist Republican Party in 1929.

[3] When a provisional government was established during the Second Republic he was appointed first prosecutor of the Supreme Court and then, director general of security.

[3] During the civil war Francisco Largo Caballero formed a cabinet on 4 September 1936, and Galarza was appointed minister of interior.

[1] Galarza exiled into Mexico at the end of the civil war[2] and was dismissed from the Spanish Socialist Workers' Party in 1946.