About the relation between Kant moral philosophy, his philosophy of history, and his philosophy of religion

Kant's philosophy, of history, as well as his philosophy of religion are bound to his practical philosophy: both presuppose it and both belong to it as necessary supplementations. This fact, now, has time and again led to the attempt to interpret Kant's philosophy of right and of history on the one hand and his philosophy of morals and of religion on the other hand as being bound together within one and the same doctrine of the highest good. This attempt must fail, and indeed from principal reasons, because the two fields never touch or, let alone, overlap each other. It actually, is nothing other than confounding the world of phaenomena with the world of noumena, worldly, matters with heavenly matters, the last end of nature with the final end of creation.