From anxiety about Muslim immigrants in Western Europe to concerns about undocumented workers and cross-border security threats in the United States, disputes over immigration have proliferated and intensified in recent years. These debates are among the most contentious facing constitutional democracies, and they show little sign of fading away. Edited and with an introduction by political scientist Rogers M. Smith, Citizenship, Borders, and Human Needs brings together essays by leading international scholars from a wide range of disciplines to explore the economic, cultural, political, and normative aspects of comparative immigration policies. In the first section, contributors go beyond familiar explanations of immigration's economic effects to explore whose needs are truly helped and harmed by current migration patterns. The concerns of receiving countries include but are not limited to their economic interests, and several essays weigh different models of managing cultural identity and conflict in democracies with large immigrant populations. Other essays consider the implications of immigration for politics and citizenship. In many nations, large-scale immigration challenges existing political institutions, which must struggle to foster political inclusion and accommodate changing ways of belonging to the polity. The volume concludes with contrasting reflections on the normative standards that should guide immigration policies in modern constitutional democracies. Citizenship, Borders, and Human Needs develops connections between thoughtful scholarship and public policy, thereby advancing public debate on these complex and divisive issues. Though most attention in the collection is devoted to the dilemmas facing immigrant-receiving countries in the West, the volume also explores policies and outcomes in immigrant-sending countries, as well as the situation of developing nations—such as India—that are net receivers of migrants.