The leading text in the field, this incisive, authoritative work offers a global perspective on the nature of migration flows, why they take place, and their consequences for states and societies around the world. Chapters provide up-to-date descriptions and comparative analyses of major migration regions in the North and South. The role of population movements in the formation of ethnic minority groups is examined, as is the impact of growing ethnic diversity on economies, cultures, and political institutions. User-friendly features include accessible boxed examples, tables, and maps.