Sergio Fabbrini is Director of the School of Government and Professor of Political Science and International Relations at the LUISS Guido Carli University of Rome, where he holds the Jean Monnet Chair. He is also Recurrent Visiting Professor of Comparative Politics in the Department of Political Science and Institute of Governmental Studies, University of California, Berkeley. He has published fourteen books, two co-authored books and fourteen edited or co-edited books. His recent publications include Compound Democracies: Why the United States and Europe Are Becoming Similar, 2nd edition (2010) and America and Its Critics: Vices and Virtues of the Democratic Hyperpower (2008).

Preface: how many Unions?; Part I. Institutionalisation of Multiple Unions: 1. From Rome to the Lisbon Treaty; 2. The Lisbon Treaty and the Euro Crisis; 3. Institutionalisation and constitutional divisions; Part II. Main Perspectives on the European Union: 4. The perspective of the economic community; 5. The perspective of intergovernmental union; 6. The perspective of parliamentary union; Part III. Towards the Compound Union Perspective: 7. Comparing democratic models; 8. Compound unions and the EU; 9. A new political order in Europe.