 The principles of practical rationality are the procedures, at a suitably abstract level of description, of a satisfactory constitution. So, and in contrast to Vogler’s view, Korsgaard’s theory of practical rationality is psychologistic. Actions have explanatory priority, but actions are the starting point of an argument used to determine the proper structure of an agent’s psychology: that is, we ask what psychological structure an agent must have in place for him to be able to author actions. And that psychology in turn determines what the correct forms of practical inference must be. The philosophical motivations of Korsgaard’s position are in part forensic: the connection between actions and agents must be such that we can hold agents responsible for what they do. More importantly, however, the account is meant to explain why your reasons are binding: what their ‘normative force’ is. 