Full Idea
Apart from Hegel, no later philosophical system equals in stature Kant's attempt to weld together the diverse fields of natural science, morality, politics, aesthetics and religion into a systematic overarching epistemological and metaphysical unity.
Gist of Idea
Only Kant and Hegel have united nature, morals, politics, aesthetics and religion
Source
Sebastian Gardner (Kant and the Critique of Pure Reason [1999], 10)
Book Reference
Gardner,Sebastian: 'Kant and the Critique of Pure Reason' [Routledge 1999], p.327
A Reaction
Earlier candidate are Plato and Aristotle. Earlier Enlightenment figures say little about morality or aesthetics. Hobbes ranges widely. Aquinas covered most things.