There has been no definite evidence to prove these theories at all. Shouldn't all monkeys have evolved to being man by now.
Man evolved from a species of monkeys which for some reason felt the need to get down from the trees and walk the earth. Everything else was triggered by this. The rest of the monkeys didn't need to get down to the ground and you can see most of them living happily up there in the tree tops to this day. It was probably some circumstance specific to where the proto-humans lived and which wasn't present anywhere else. Just the same way as there are amazonian tribes who still haven't set foot into the 11th, let alone the 21th century.
All these statements are very controversial. Why don't you think that on the contrary some people for some reason run wild and eventually turned into monkeys? How do you get this theory? All of these questions was to answer genetics but they for some reason are silent.