The term "open borders" refers to a policy of allowing free movement between countries without restrictions or border control. In an era characterized by the Brexit referendum and the Trump administration's policy of restricting immigration in the U.S., the prospect of borders being open may seem improbable. A number of politicians, policymakers, economists, and citizens assert that referendums and restrictions are the best way to address the economic and social issues that the international community faces today. This volume helps readers examine the issue of open borders from a variety of angles, examining its economic, social, political, moral, and legal aspects.