 Teleological theories are not, strictly speaking, theories about value. They are theories about right action, or about what one ought to do. But they are committed to claims about value, because they appeal to evaluative facts, in order to explain what is right and wrong, and what we ought to do — deontic facts. The most obvious consequence of these theories, is therefore that evaluative facts must not then be explained in terms of deontic facts. The evaluative, on such views, is prior to the deontic.