> I do not think learning about evolution (and we should credit Wallace too!) had that effect. It created a hierarchy of the fittest, and guess who is at the top? Social Darwinism interpreted it as justifying elaborate hierarchies.

I don't think that's accurate at all. Before Darwin, the thought was "we are special, we were born special, we were CREATED special". Darwin made it clear we weren't created special... we were apes before we were humans. There's nothing _special_ about a human as compared to an ape, other than some time to change.