In contemporary Europe, power is increasingly shared. Federalism and regionalism develop in parallel to supra-national integration.
This book emphasises the links between the European Union and the entities of its federal and regional States, in particular through their participation in the creation and the implementation of supra-national law. It examines the co-operation between the entities and the national State in the process of integration and the influence of integration upon the internal distribution of powers
it also deals with regional integration in other parts of the world (North America and Southern Africa).