This book provides a collection of key papers about migration, focusing on multiple aspects of international and internal migration in various times and places. Because migration has been such an important part of global peopling, the book contains synopses of major geographic movements from ancient and early history as well as the present. It includes material from anthropology, archaeology, criminology, demography, economics, ethnic studies, geography, health sciences, history, law, public policy, political science, psychology, and sociology. By providing a treatment of migration that is multifaceted, comparative, and multi-disciplinary, it offers not only a basis for conceptualizing broad features of migration and their changes, but also one for discerning the formal and informal policy auspices that have influenced migration. The book thus constitutes a significant resource for students, teachers, practitioners, scholars, and researchers interested in or working on aspectsof migration in any field. It should be particularly useful for people seeking information and knowledge about migration from fields other than their own.