Professor of Political Science and Comparative Politics at the University of Turin. He is a member of the Executive Committee of the World Federalist Movement, and was president of the European Federalist Movement from 2009 to 2015. He is the editor of The Federalist Debate and has published 15 books on federalism, European integration and international organizations, among which: L’internationalisme ne suffit pas. Internationalisme marxiste et fédéralisme, Lyon, 1984 (in French) and Altiero Spinelli and Federalism in Europe and the World, Milano, 1990; Contributor to the Reader on Second Assembly; Parliamentary Proposals, edited by the Center for UN Reform Education, Wayne, NJ, 2003, University Press of America, 2008; Federalist Thinking, University Press of America, 2008, edited with Giovanni Finizio and Nicola Vallinoto the First International Democracy Report, published as The Democratization of International Institutions, 2014, Routledge, and edited (with Giampiero Bordino and Antonio Mosconi) Federalism. A Political Theory for Our Time, a collection of essays published between 1999 and 2015, Peter Lang, 2016. This paper was first published in issue 2007/1 of this jounal.