“Metaphysics about Metaphysics.” Kant on Theoretical, Practical and Practico-Theoretical Metaphysics

The essay investigates the relation between metaphysics and practical philosophy in Kant by reconstructing Kant‘s systematic typology of metaphysics as developed in his critical writings. Section 1 deals with Kant’s rigorous reduction of philosophy to metaphysics. The focus here is on the epistemological turn effectuated by Kant with regard to metaphysics (theoretical metaphysics). Section 2 is concerned with Kant’s reconceptualization of (pure) practical philosophy as a metaphysics sui generis. At the center stands here Kant’s supplementation of the metaphysics of nature through a metaphysics of morals based on moral freedom (practical metaphysics). Section 3 addresses the merging of theoretical and practical metaphysics in Kant. The focus here lies on Kant’s introduction of a novel, practically validated form of (quasi-)theoretical metaphysics (practico-theoretical metaphysics). Throughout the essay combines an analytic interest in the forms and functions of metaphysics in Kant with a systematic interest in the practical and practico-theoretical transformation of previously theoretical metaphysics in Kant, which morphs from a doctrine of the objects of nature through a doctrine of the laws of freedom to a doctrine of wisdom regarding the supersensible.