It's math:

Total number of great apes on Earth, worldwide: 500,000

Total number of humans on Earth, worldwide: 7,000,000,000

fig05The number of great apes worldwide is decreasing. Even if every ape in the world learned to speak and was interested in attacking us, we'd wipe them out in a day. The largest ape populations in American cities are perhaps twenty apes in a zoo, a mix of a few gorillas, four or five chimpanzees, and assorted smaller species.

Some people will find this comforting.