What does evolutionary theory say then, if not from some variety of ape? (There is no species ape that I am aware of. Ape is a genus, which includes chimps, orangs, baboons, mandrils etc. all under the general heading of Pan. I have read that there is a facetious move afoot to end the distinction homo and place us under the heading of Pan Naritivarius, the story telling ape, as there is less difference between homo and pan than there is between any other two varieties of pan.)
The most fun and interesting evolutionary theory I have read is that humans are a sort of aquatic chimp that liked to live in and around lakes. I have heard that that theory is pretty universally discredited, which is a pity as it explains so much so well