An authoritative directive, when it has legitimacy, is a reason to exclude from consideration some of the reasons to act and not to act in this way. One is obliged to obey, even when one disagrees with the directive. Therefore, authority demands deference regarding how one acts, although one is free to think what one likes about that action. How can deference of this kind be compatible with freedom and rationality? That is the so-called moral problem of authority. For some, (...) authority has legitimacy in a deliberative democracy because deference to its rules better meets the demands of freedom and rationality. As I hope to show here, this line of thought does not give an adequate account of authority. If a directive is legitimate only if it has a certain content, as deliberative democrats are saying, one does not defer to but rather merely complies with such a directive. (shrink)