A chimp would never plan to pull another's nails out.

It has actually been suggested that warfare may have been the principle evolutionary pressure that created the huge gap between the human brain and that of our closest living relatives, the anthropoid apes. Whole groups of hominids with inferior brains could not win wars and were therefore exterminated.

Lasting change is a series of compromises. And compromise is all right, as long your values don't change.

Chimpanzees, more than any other living creature, have helped us to understand that there is no sharp line between humans and the rest of the animal kingdom. It's a very blurry line, and it's getting more blurry all the time.

I think the most important thing is to keep active, and to hope that your mind stays active.

We now know that the structure of the DNA in humans and chimpanzees differs by only just over one percent. You could even have a blood transfusion from a chimp, provided you have the same blood group.

Young people, when informed and empowered, when they realize that what they do truly makes a difference, can indeed change the world.