The migration movements of the 20th century have led to an increased interest in similarly dramatic population changes in the preceding century. The contributors to this volume - legal scholars, sociologists, political scientist and historians - focus on migration control in the 19th century, concentrating on three areas in particular: the impact of the French Revolution on the development of modern citizenship laws and on the development of new forms of migration control in France and elsewhere; the theory and practice of migration control in various European states is examined, focusing on the control of paupers, emigrants and "e;ordinary"e; travelers as well as on the interrelationship between the different administrative levels - local, regional and national - at which migration control was exercised. Finally, on the development of migration control in two countries of immigration: the United States and France. Taken altogether, these essays demonstrate conclusively that the image of the 19th century as a liberal era during which migration was unaffected by state intervention is untenable and in serious need of revision.