For our current purposes, we shall think of persons as voluntary deciders who make decisions with varying degrees of deliberation and rationality relative to their intentions or goals. They settle on chosen options and then proceed to try to bring about those options, with more or less success. Such decision-making has a creative aspect, at least in the chosen timing of exercise of a will, even if the decision is familiar or ill-advised. For instance, readers of this chapter are persons who have decided voluntarily to read it, and they could have decided otherwise. We have no reason to suppose that the laws of nature or of science or any other laws require their reading it, now or ever.