 When Reid talks about our capacity to be governed by law he has in mind our capacity to regulate our behavior by assessing it in terms of the two rational principles of action. Reid, then, champions what we might call a regulation account of autonomy. We are autonomous, rational agents, in Reid’s estimation, in virtue of the fact that we can regulate or govern our behavior by stepping back from our various impulses, desires, instincts, and assess prospective actions in light of the two rational principles of action. It is this dimension of human action, according to Reid, that is missing altogether from the description of agency offered by advocates of the System of Necessity.