Natural or rational theology

If the separation of philosophy and theology had its (unwitting) origin in the piously Catholic Descartes' option to put all philosophy on the soundest possible footing, the canonization of natural or rational theology seems to have been done by Kant. Kant it was who excluded God from the reach of pure reason, and made place for him as a merely regulative idea or ideal... Kant it was who wrote of Religion within the Limits of Reason Alone. And though Catholic seminaries have long been passing critical remarks about Kant's critical enterprise, they have also been unwittingly subscribing to his views by running courses under the name Natural Theology or Philosophical Theology or Philosophy of God...