This study offers a comprehensive, up-to-date survey of global patterns of international migration and the policies employed to manage the flows. It shows that international migration is not rooted in poverty or rapid population growth, but in the expansion and consolidation of global markets. The insertion of non-market societies into global networks of trade unleashes structural transformations that displace people to create migrants. Globalization also creates infrastructures of transportation, communication, and social networks to put developed societies within reach.