The United States in the last half century has undergone rapid and fundamental changes as economic restructuring, aging, and increasing cultural and ethnic diversity profoundly alter its national character. This groundbreaking book examines the links between migration and the ongoing economic and demographic revolution. Utilizing an explicitly geographic perspective, the contributors highlight the crucial role played by scale and spatial context in both immigration and internal migration. They show that the economic and demographic restructuring underway is a distinctly geographic phenomenon with immense variation over region and locale. Bringing together the leading migration scholars from geography, economics, sociology, and demography, this multidisciplinary collection represents the cutting edge in the field and explores important implications for future research.