Why did not all monkeys and mammals become humans?

Many people misunderstand genetics. It says, “Man is descended from the monkey.” In fact, we humans are not descended from the monkeys we see today. The monkeys we see today are descended from the ancient monkeys.

Chimpanzees are the closest species to the monkeys we see today. Chimpanzees are closer to us than mice and rats. We and the chimpanzee have up to 99% the same DNA as the other gorillas.