Interpreters of Reinhold Niebuhr generally ascribe the inconsistencies in his view of history to either his changing mind or inadequacies in the development of Christian realism. These perspectives can be insightful but they neglect larger and more systematic questions about the relation of Niebuhr to the specific historical period he addresses, that of liberalism. This essay argues that Niebuhr's work both draws more deeply on liberal assumptions and poses sharper historical criticism than is often recognized. The analysis provided below demonstrates that while Niebuhr identifies the rationalized self-legitimation in the liberal teleology of progress, his view of the historical development of individuals and societies reproduces the idea that liberal society is the culmination of all previous historical periods. The difficulties Niebuhr has in overcoming the limits of liberal categories are instructive regarding the complexity of criticizing a society of which we are a part.