We do not live in a just world. This may be the least controversial claim one could make in political theory. But it is much less clear what, if anything, justice on a world scale might mean, or what the hope for justice should lead us to want in the domain of international or global institutions, and in the policies of states that are in a position to affect the world order. By comparison with the perplexing and undeveloped state of (...) this subject, domestic political theory is very well understood, with multiple highly developed theories offering alternative solutions to well-defined problems. By contrast, concepts and theories of global justice are in the early stages of formation, and it is not clear what the main questions are, let alone the main possible answers. I believe that the need for workable ideas about the global or international case presents political theory with its most important current task, and even perhaps with the opportunity to make a practical contribution in the long run, though perhaps only the very long run. (shrink)

Many poor and oppressed people wish to leave their countries of origin in the third world to come to affluent Western societies. This essay argues that there is little justification for keeping them out. The essay draws on three contemporary approaches to political theory - the Rawlsian,the Nozickean, and the utilitarian - to construct arguments for open borders. The fact that all three theories converge upon the same results on this issue, despite their significant disagreements on others, strengthens the case (...) for open borders and reveals its roots in our deep commitment to respect all human beings as free and equal moral persons. The final part of the essay considers communitarian objections to this conclusion, especially those of Michael Walzer. (shrink)