Am somewhat convinced that the philosophical basis of "Western Civilisation" is a bunch of post-Roman European intellectuals trying to appropriate the rationalistic aspects of the broad Platonist philosophical project, merge it with Aristotelianism, and bury the whole decivilising part of gnosis.
You see it in the fact that people like Plato and his descendants when they talk about beauty, goodness, truth and all that as being pre-existent Forms, from which they derive a metaphysical rational-idealist theory of objective morality, but have no interest in theia mania.
And that's a problem because Plato sees divine madness as the best form of access perceiving the divine world, which pre-exists the material cosmos, and describes four kinds of madness given by the gods. So it's taking up the rationalism of Platonism, but not its real heart.