"Didn't "early man" live in the same environment as gorillas? NYC did not exist 10 million years ago. And you can't say "early man" built cities because they were social and apes were not. "
Actually, "early man" didn't live in the same environment as gorillas. Indeed, the modern gorilla didn't even exist at that time.
"Early man" developed on savannahs, primarily, where upright bipedal locomotion was an advantage. Gorillas have always been creatures of deep forests.
"Early man" did not build cities.