Egypt, Greece, Sumeria, all nice warm places with very moderate winters. No need to change anything because things were peachy there....
I'm not going to get into an "egyptians were not africans" debate
Point is they had access to culture and other civilisations. Just read the wiki article on Sumer to see how much other populations influenced them.
Hitler's like the Mickey Mouse of evil. Except Goofy is Goebbels and Minnie is on fire in a ditch.