Philosophical orthodoxy identifies weakness of will with akrasia: the weak willed person is someone who intentionally acts against their better judgement. It is argued that this is a mistake. Weakness of will consists in a quite different failing, namely an over-ready revision of one's intentions. Building on the work of Bratman, an account of such over-ready revision is given. A number of examples are then adduced showing how weakness of will, so understood, differs from akrasia.

I think that clear sense can be made of weakness of will in terms of agents' acting against the dictates of their reason; and that this can be done without becoming enmeshed in the faculties of the mind, and without denying what is right about Humean views about reason and desire. My starting point is, in fact, a Humean position about reason and desire.