By executive order, the US adopted an immigration policy that looks remarkably similar to a Muslim ban, and threatened to deport long-settled residents, such as the so-called Dreamers. Our defunct refugee system has not dealt adequately with increased refugee flows, forcing desperate people to undertake increasingly risky measures in efforts to reach safe havens. Meanwhile increased migration flows over recent years appear to have contributed to a rise in right-wing populism, apparently driving phenomena such as Brexit and Trumpism. In this original and insightful book Gillian Brock offers answers and tools that assist us in evaluating current migration policy and in helping to determine which policies may be permissible and which are normatively indefensible. She offers a comprehensive framework for responding to the many challenges which have recently emerged, and for delivering justice for people on the move along with those affected by migration.