Kantian Metaphysics and the Normative Force of Practical Principles

The aim of this paper is threefold. First, I critically examine two dominant Kantian views of practical justification and argue that they cannot provide an appropriate account of the normative force of moral and political principles. Secondly, as the main reason for these unsuccessful attempts, I identify a certain (by now standard) interpretation of Kant's account of practical judgement. Finally, I point to some of the differences between this interpretation and Kant's own claims on practical judgement, in order to suggest an alternative approach; I also note the tension between slogans, like ‘political, not metaphysical” or ‘we must stay philosophically on the surface’, on the one hand, and, on the other, the appeal this alternative approach must make to some elements of Kant's metaphysics.