This article examines the debate between liberalism and communitarianism in contemporary political philosophy and considers its significance for international relations. The debate tends to pose a false dichotomy between liberalism and communitarianism, and neither position alone can provide an adequate basis for international relations theory. It is necessary to go beyond the liberal-communitarian divide in order to reconcile the valuable insights that may be rescued from both positions. There is a community which is a moral reality, which includes all individuals and maintains their moral integrity, and which can accommodate all legitimate, smaller communities. This is the community of humanity, which is recognized in traditional theories of natural law and the law of nations. The article concludes by considering whether the universal community of humanity requires and justifies world government.