 As already noted, many have found the basic Humean picture most plausible. Before examining a few of the considerations thought to favor it, we should make note of the fact that Humeanism does not itself commit one to any particular view as to the sorts of desires responsible for moral motivation. A Humean might well take the view that no particular desire is implicated in moral motivation. On the contrary, varying desires may, when contingently present, move an individual to do what she judges she ought to do, including the desire to be well regarded by her neighbors, to advance her interests in some way, or to promote the welfare of those who matter to her. Appealing simply to some contingent desire or other may be inadequate, however, to explain the basic phenomenon of moral motivation. After all, what needs to be explained, many would argue, is not merely how we may, on occasion or even frequently, be motivated to do as we think we ought: what needs to be explained is how we are reliably motivated to do as we think we ought. That includes explaining why motivation reliably shifts so as to track changes in our moral beliefs. As we will see, those who accept the Humean picture have sometimes suggested that we look to quite particular desires or to deep features of human psychology to explain moral motivation.