The aim of this paper is twofold: In its first part, we work out the key features of constitutivism as presented by Christine Korsgaard. This reconstruction serves to clarify which goals Korsgaard wants to achieve with her account and which of its central claims she has to defend in particular. In the second part, we discuss whether Korsgaard can vindicate constitutivism's most central claim. To do this, we analyse two important arguments - the argument from unavoidability and the argument from (...) the abstract constitutive principle - that have been made in support of constitutivism. We show how both these arguments go amiss and conclude that at least for now, constitutivism's most central claim has not been successfully argued for. (shrink)

Recently, Christine Bratu and Mortiz Dittmeyer have argued that Christine Korsgaard’s constitutive project fails to establish the normativity of practical principles because it fails to show why a principle’s being constitutive of a practice shows that one ought to conform to that principle. They argue that in many cases a principle’s being constitutive of a practice has no bearing on whether one ought to conform to it. In this paper I argue that Bratu and Dittmeyer’s argument fails in (...) three important respects. First, they fail to recognize the ways in which Korsgaard’s neo-Kantian view departs from more orthodox Kantian views. Second, they fail to recognize the respect in which Korsgaard’s view is a version of moral rationalism. Third, they overlook an important scope ambiguity in an important premise of their argument. A sensible way of resolving this ambiguity gives the constitutivist a reasonable response. (shrink)