According to a volitionist approach, agency is to be explained in terms of acts of the will, usually called “volitions”. On this view, volitions are the source of agency: an overt movement is an action just in case it is caused, in the right way, by a volition. Volitions themselves are entirely uncaused and they are sui generis acts: they are acts in virtue of their intrinsic properties, not in virtue of some extrinsic or relational property (such as having the right causal history). This is also a non-reductive approach to agency, but it differs sharply from both the event-causal and the agent-causal framework in the important respect that it rejects the suggestion that all actions are events with a certain causal history (Ginet 1990; McCann 1998; see also Lowe 2008).[15]