To understand the theory of evolution, you have to listen to the people who are explaining it to you very closely. I, or We preferably, didn't come from any Baboon or any Gorilla so to speak, we didn't come from anything period. Always, there has been man, just not modern man. Through millions of years man gradually changed into us, what we are today. If you go back far enough on the family tree, using the theory of evolution, say like a couple of 10 million years, every single one of us could have shared the same primative parents as did our gorilla cousins and our chimpanzee (however you spell it) cousins.