Charles Darwin.
It could be argued that his evil myth - the theory of evolution, or, Darwinism — gave rise to demons like Karl Marx, Margaret Sanger, and Joseph Stalin, among others.
Charles Darwin was a truly evil man.
“Charles Darwin was a truly evil man.”
I was also thinking of a person - or people - that create the ideas, rather than the actual deed-doers.
So when I saw Darwin - I agreed. However, I’m not sure that he is the one that is evil. His intent was just “science” - even if he was wrong about his ideas. (His theory of evolution - with it being a slow, gradual thing is now seen as impossible by today’s evolutionists who go for the huge genetic change in one speciman - the “hopeful monster”). I don’t agree with either.
Anyway - I’m not sure that I would consider Darwin himself evil. His theory of evolution? Perhaps, if an idea can be evil.
I was thinking along the lines of Karl Marx - who spawned the idea of Communism. So then that would cover Lenin, Stalin, Mao, the millions dead in Vietnam, Laos, Pol Pot in Cambodia, etc.
Thinking about it more (Cuba, Venezuela, .....) - Karl Marx.