Good and evil are products of the interpretive mind, one that absolve itself of its own interpretation which leads to the concepts appearing to stand on their own. They're social facts masquerading as common sense, "the way the world works", and reality.

That's not to say there aren't consequences to rejecting them as such, we have a whole system for social fact enforcement that includes social, physical, and mental punishment, but that doesn't mean that one can't appreciate them as social facts either.

Would evil exist in the natural world absent humans? If not, then evil is a property contingent on humans in one way or another.