Over the past twenty-five years, Jürgen Habermas has presented what is arguably the most coherent and wide-ranging defense of the project of European unification and of parallel developments towards a politically integrated world society. In developing his key concepts of the transnationalization of democracy and the constitutionalization of international law, Habermas offers the main players in the struggles over the fate of the European Union - politicians, political parties and the public - a way out of the current economic and political crisis, should they choose to follow it. This volume reflects the impressive scope of Habermas's recent writings on European themes, including theoretical treatments of the complex legal and political issues at stake, interventions on current affairs, and reflections on the lives and works of major European philosophers and intellectuals.