At the turn of the twenty-first century, international migration has become a central issue in international relations and one of the most important questions of domestic politics in many countries. THE AGE OF MIGRATION provides a global perspective on the nature of migration movements, why they take place, and their effects on countries as different as Britain and the USA, Australia and Germany, and Canada and France. Showing how migration almost always leads to formation of ethnic minorities, the book examines how growing ethnic diversity affects economies, cultures, and political institutions and challenges existing forms of citizenship and national identity. This second edition has been completely revised and updated, including increased coverage of new migrations in Africa and Latin America and a new chapter on the Asia-Pacific region.