He is Professor of Sociology and International Relations at the Faculty of Political Science and Sociology at the Complutense University of Madrid. Guest lecturer at universities in Brazil, Mexico, Cuba and El Salvador. Author of books related to the subject matter of this Cuaderno: El proyecto de Gramsci, La izquierda y el cristianismo, Nuevo socialismo y cristianos de izquierda, Justicia global, Desigualdades internacionales, ¡justicia ya! He has also published the monograph Refundación de la izquierda y cristianismo. The proposals of the PCI.