A compelling account of the threat immigration control poses to the citizens of free societies Immigration is often seen as a danger to western liberal democracies because it threatens to undermine their fundamental values, most notably freedom and national self-determination. In this book, however, Chandran Kukathas argues that the greater threat comes not from immigration but from immigration control. Kukathas shows that immigration control is not merely about preventing outsiders from moving across borders. It is about controlling what outsiders do once in a society: whether they work, reside, study, set up businesses, or share their lives with others. But controlling outsiders—immigrants or would-be immigrants—requires regulating, monitoring, and sanctioning insiders, those citizens and residents who might otherwise hire, trade with, house, teach, or generally associate with outsiders. The more vigorously immigration control is pursued, the more seriously freedom is diminished.