Simple Probabilistic Promotion

Many believe that normative reasons for action are necessarily connected with the promotion of certain states of affairs: on Humean views, for example, there is a reason for you to do something if and only if it would promote the object of one of your desires. But although promotion is widely invoked in discussions of reasons, its nature is a matter of controversy. I propose a simple account: to promote a state of affairs is to make it more likely to obtain than it previously was. I argue that this view has been unfairly neglected, that it avoids serious problems faced by many other views, and that it is a contender for the correct theory of promotion.