It is often believed that domestic principles of justice cannot ground freedom of international movement. Some argue that since principles of justice are not global in scope, justice does not require freedom of movement at the global level. This is problematic, for it confuses the grounds with the scope of justice. Given that the scope of justice is potentially global, freedom of movement must also be global in scope. Others have argued that the grounds of freedom of movement themselves are restricted in scope. If cooperation, democracy, and coercion are what presumably ground the right to freedom of movement, to the extent that they are not global in scope, freedom of movement need not be global in scope either. In this article, I argue that even if the grounds of freedom of movement are or should not be global in scope, freedom of movement must be.