The moral problem of authority can be expressed as follows: how can authority, and the deference it entails, be compatible with freedom and rationality? The pluralist approach separates political obligation from authority. For pluralists, authority is both unjustifiable and unnecessary, and so legitimate political obligation, including the duty to obey the law, does not entail deference. I argue that it is possible to retain the pluralist commitment to plural grounds of legitimacy, while rebutting the pluralist objections to authority. As a result, whenever authority does have legitimacy, the moral question of authority will demand an answer.