A broad-ranging history of defectors from the Communist world to the West and how their Cold War treatment shaped present-day restrictions on cross-border movement. Defectors fleeing the Soviet Union seized the world's attention during the Cold War. Their stories were given sensational news coverage and dramatized in spy novels and films. Upon reaching the West, they were entitled to special benefits, including financial assistance and permanent residency. In contrast to other migrants, defectors were pursued by the states they left even as they were eagerly sought by the United States and...