This book provides a comprehensive and detailed examination of the successes and failures of federalism in a diverse range of multi-ethnic polities and societies. It offers excellent coverage of the experiences of a wide range of contemporary states with specially commissioned contributions from established authorities. An introductory chapter introduces the reader to the nature of federations, the political philosophies that underpin federalism, the characteristics of federal formations, and highlights some of the theories as to why this system of government has failed in some cases to provide ethno-regional stability. A concluding chapter draws upon the findings and examines the prospects for federalism in the light of the acceleration towards greater economic interdependency and local political fragmentation, in the post-Cold War world.