This is the first full-length study in English of the role of Marxist theory in the Spanish Socialist movement prior to the outbreak of Civil War in 1936. In particular, the author stresses the intellectual poverty of this aspect of leftwing politics in Spain. In concentrating on the Partido Socialista Obrero Espafiol (PSOE), the major organised party of the left prior to the Civil War, the study seeks to achieve two main aims: first, to attempt to...