The aim of this article is to discuss Bernard Williams’s theory of reasons for action. Following the introduction and analysis of its main concepts and the identification of the argument that it is offered in its favor and against alternative positions, I analyze the objection that the soundness of this argument depends on the acceptance of a procedural conception of correct deliberation that Williams would have assumed, without offering any argument, as true. I argue that this objection is false because (...) it is possible to identify in his writings a supplementary argument justifying his preference for a procedural conception. (shrink)