At no time in modern history have so many people been on the move as at present. Migration facilitates critical social, economic, and humanitarian linkages. But it may also challenge prevailing notions of bounded political communities, of security, and of international law. The political and legal systems that regulate the transborder movement of persons were largely devised in the mid-twentieth century, and are showing the strains. New challenges have arisen for policymakers, advocates, and decision-makers that require the adaptation and evolution of traditional models to meet emerging imperatives. This new series aims to be a forum for innovative writing on all aspects of the transnational movement of people. It publishes single or coauthored works that may be legal, political, or cross-disciplinary in nature.

• General Editors: James Hathaway, James E. and Sarah A. Degan Professor of Law, and Director of Michigan Law's Program in Refugee and Asylum Law, University of Michigan
• Editorial Advisory Boards: Alexander Betts, Leopold Muller Professor of Forced Migration and International Affairs, and Director of the Refugee Studies Centre, University of Oxford, Vincent Chetail, Professor of Public International Law and Director of the Global Migration Centre, Graduate Institute of International and Development Studies, Switzerland, Thomas Gammeltoft-Hansen, Professor with Special Responsibilities in Migration and Refugee Law, University of Copenhagen, Audrey Macklin, Professor and Chair in Human Rights Law, University of Toronto, Saskia Sassen, Robert S. Lynd Professor of Sociology and Chair of the Committee on Global Thought, Columbia University, New York