What many responded to in Wordsworth’s evocations of Nature’s sacrality was his restoration of a partially obscured link between Nature and the divine.
Consideration of Erasmus Darwin’s writings suggests that his unbelief could well have been father to the thought in the matter of his evolutionary speculations.
Literary critic William Empson, in a famous study, described Satan as the de facto hero of the epic in a cosmic revolt against divine repression.
“Strange that it may seem, Darwin plays a central role in this drama. Karl Marx himself credited Darwin with much of his basic insight into human history.”
It is basically the denial of human exceptionalism. That is, it is hatred of man, in practically every way imaginable.