 Among the goals of action theory is to distinguish what we do from what merely happens to us (see, e.g., Davidson 1980: ch. 3). Suppose that on the best way to draw this distinction, action (agency) requires alternatives. Some event in your life, that is, doesn’t count as something you did unless an alternative was within your power. For example, when you’re awakened by a noise, this is not an event you could have avoided, and so it was not an action, not an exercise of your agency. Similarly, events such as stumbling, sweating, and blushing aren’t things you (strictly) do: they happen to you. To this list we could add mental events such as obsessive thoughts: when such thoughts are, in the relevant sense, unavoidable, they belong to the sufferer only in the sense that the person is their subject, the arena in which they occur, not their agent. Given this view of action, PAP follows immediately: if action requires alternatives, then a fortiori, action for which one is morally responsible requires them.