This book brings together the works of the members of the group of research on the history of socialism at the Center for Research and Studies on Culture and Society (C.I.E.C.S.), a dual-dependent executing unit of the National University of Córdoba and the National Council for Scientific and Technical Research (CONICET), Argentina. The works are part of the Formar Project, “Between Europe and America: Comparative History of International Socialism (1890-1973)” of the Secretariat of Science and Technology-National University of Córdoba, located in the Research Center of the Faculty of Philosophy and Humanities (CIFFyH-UNC). Likewise, the volume has the collaboration of three researchers who took part in the Seventh Conference on the History of Socialism, organized by the Contemporary History Program of the Center for Research and Study on Culture and Society.