This paper looks at the topic of immigration from a philosophical standpoint and concludes that an open border policy is morally obligatory. I first argue that immigration cannot act as a corrective to the problems of global poverty as many philosophers have suggested. I then look at two common defenses for restrictive borders, one resting on the cultural community and one on the political community, and conclude that these two defenses are inadequate. The fact that a restrictive policy is morally unjustifiable coupled with my argument that people ought to be able to enjoy a freedom of movement suggests that an open border policy is necessary.