The Moral Law Within You

Stephen Darwall argues that the conditions of the possibility of addressing demands second-personally entail a commitment to Kantian moral principles. He also argues that previous attempts to vindicate Kantian morality, as a necessary presupposition of agency, have failed. I defend both of Darwall’s arguments against recent objections. But my replies help to bring out a dilemma: either Darwall’s account collapses into previous versions of Kantianism, or it renders morality problematically contingent. I reject the first horn, and then argue that the contingency worry is either not as serious as it seems or affects other versions of Kantianism more severely.