Christine Korsgaard’s 1996 book, The Sources of Normativity, attracted a great deal of attention. And rightly so. It is a highly engaging attempt to answer what she calls the normative question, which is the question of what could justify morality’s demands. Korsgaard’s latest book, Self-Constitution, develops and defends the broadly Kantian account of action and agency that hovers in the background of Sources, drawing out its implications for the normative question. In this review, we present the main lines of argument in Self-Constitution, raising objections to both Korsgaard’s account of action and agency and her most recent attempt to address the normative question.