This book is based on contributions made to the WG Hart Workshop 2003. It contains articles by leading experts seeking to assess the state of development of EU law some fifty years after the establishment of the Communities and to contribute to the current debate on the European Constitution. The first volume concentrates on the themes of European Constitutionalism and EU external relations. It analyses the proposed Constitution dealing, among others, with the division of competence between the EU and the Member States, Community legislation, the role of national parliaments, democracy in the EU, human rights, and the Court of Justice. It also contains articles on EU external relations covering, among others, enlargement, the common foreign and security policy, immigration and asylum policy, and the relations between the EU and the WTO.