It would be illuminating for you to present your evidence of this claim other than evolution. A citation, or historical reference would suffice.<quoted text>
This notion that morality didn't exist prior to religion or that it transcends cultural norms is hogwash.
I'd be interested in knowing what philosopher outside of religious thinkers convinced you of that. Religion merely codified and enforced certain social norms. It you want to talk about where morality comes from "intrinsically" look no further than evolution and the notion that what is good for the group, also benefits me.
My understanding of evolution is that evolution does not care whether or not you have been good, Its a process.
However, as an aside, you want to impute agency on it, then you might as well consider worshipping it.