Rainer Baubock is senior researcher at the Institute for European Integration Research of Austrian Academy of Sciences in Vienna and is professor at the European University of Florence. Previous publications: Transnational Citizenship (1994), From Aliens to citizens (1994), The Challenge of Diversity (1996), Blurred Boundaries (1998), Migration and Citizenship (2006). John Rundell is Principal Honorary and Associate Professor and Reader in Social Theory at The University of Melbourne, Australia. He is the author of The Origins of Modern Social Theory from Kant to Hegel to Marx, the editor of Aesthetics and Modernity: Essays by Agnes Heller, and the co-editor of Between Totalitarianism and Postmodernity; Rethinking Imagination: Culture and Creativity; Culture and Civilization: Classical and Critical Readings; Blurred Boundaries: Migration, Ethnicity, Citizenship; Critical Theory After Habermas: Encounters and Departures; Contemporary Perspectives in Social and Critical Philosophy; and Recognition, Work, Politics: New Directions in French Critical Theory.