The growing scale of international migration has generated new questions about the social rights and social protection available to people outside their countries of origin. In particular, this rings true for the hidden extent of South-South migration which represents about two fifths of all global migration. What responsibilities do states have towards non-citizens? What are the implications of states using access to public welfare as a means of immigration control? How can the idea of social protection as a mechanism to meet the basic needs of the poorest, be extended to those who are poor in other countries? This book uses conceptual frameworks, policy analysis and empirical studies of migrants to explore the tensions between migrants' needs for protection, and the practices and policies which may lead to such protection being denied, or in some cases, made available selectively to privileged groups. It also explores the responsibility of sending states to their own citizens who migrate. By taking a global perspective, the contributors hope to raise awareness of the multifaceted aspects of social protection for migrants.