Constitutionalists have not been eager to deal with the legal structures and problems of the European integration process from the viewpoint of the nation-state and have often surrendered the treatment of these issues to Community law experts. This text offers a presentation of different nation-state constitutional approaches to the problems of European integration. It covers a number of diverse nation-state constitutional approaches to the phenomenon of integration and various integration processes in the contemporary world. Topics of particular focus include: the formation of supranational and federal structures; the relationship and differences between these two kinds of structures and a possible conflict between them; and the problems of European integration. The International Association of Constitutional Law organized a Round Table Conference in Turku, Finland in May 1997 on the theme of this book. The contributions comprise the updated papers delivered at the Turku Round Table.