He is Professor of Political Philosophy at the National University of Distance Education and Director of the International Journal of Political Philosophy. It works especially on issues related to the nature of political philosophy, the problems of a redefinition of democracy and the philosophical and political dimensions of social movements. His recent publications include: XXI Century: a new paradigm of politics? (coordinator, 2004), Nature and sense of citizenship today (2005), the plurinational state and citizenship. Constitutionalism and national question (2008), "Between religion and morality: political neo-fundamentalism in America" (2004), "The new configuration of the 'other' as the enemy: the clash of civilizations" (2004), "Democracy and public virtues "(2005)," Interview: about the limits of Modernity "(2006)," Ethics and Politics: on the relationship between moral philosophy and political philosophy. An historical-conceptual approach "(2007) and" Equality and gender. Reflections from political philosophy "(2008).