Despite views to the contrary, 'action' is not a concept alien to ordinary ways of thinking, hence the significance of the philosophical problem of action, which demands that we ground this concept in some real difference between actions and other occurrences. I argue that of the two likely candidates, the causal and the volitional theories of action, the causal approach will not suffice because it is unable to cope with instances of wayward causality.My concern is principally with the volition theory of which the views of James and Prichard are discussed at length. James's account of the will is deemed unacceptable by virtue of its emphasis upon introspection. While Prichard appears to offer good reasons for believing that will...