Ferran Requejo is Professor of Political Science at the Universitat Pompeu Fabra, Barcelona, Catalonia, Spain, where he is Director of the Research Group on Political Theory. He has been Director of the Institute of Self- Government Studies, member of the Spanish Electoral Board and member of the Advisory Council for the National Transition. He has been awarded the Rudolf Wildenmann Prize (ECPR), the Ramon Trias Fargas Prize and the Spanish Political Science Association Prize for the best book (Multinational Federalism and Value Pluralism, Routledge 2005). His main fields of research are theories of democracy, federalism, multinational democracies, political philosophy and liberalism after World War II.

Marc Sanjaume- Calvet is Assistant Professor in Political Theory at the Universitat Pompeu Fabra, Barcelona, Catalonia, Spain. He is a former advisor and researcher at the Institute of Self- Government Studies. In 2015, he received the International Association of Centres of Federal Studies Young Researcher Award (IACFS). His main fields of research are federalism, theories of self- determination and secession, multinational democracies and political theory.