There are still monkeys and chimps in the world because they evolved from previous species, just like us. Go back a few million years, and the "chimp-like" and "monkey-like" creatures you'd see wouldn't be the same species as you see today; they are their ancestors.
This diagram explains it quite simply:
This diagram explains it quite simply:
![[Image: phillytree.png]](https://images.weserv.nl/?url=img46.imageshack.us%2Fimg46%2F3795%2Fphillytree.png)