Professor of American History at the Pablo de Olavide University in Seville, Spain and Director of the Department of Geography, History and Philosophy and of the research institute El Colegio de América, Centro de Estudios Avanzados para América Latina at the Pablo de Olavide University. PhD in History of America from the Pablo de Olavide University and a Post-doctorate in Educational Sciences from the Pedagogical and Technological University of Colombia. Justo is a corresponding member of the Colombian Academy of History and belongs to the Latin American Council of Social Sciences and the Latin American Faculty of Social Sciences.