A sense of calm came over me. More and more often I found myself thinking, "This is where I belong. This is what I came into this world to do.

You may not believe in evolution, and that is all right. How we humans came to be the way we are is far less important than how we should act now to get out of the mess we have made for ourselves.

The least I can do is speak out for the hundreds of chimpanzees who, right now, sit hunched, miserable and without hope, staring out with dead eyes from their metal prisons. They cannot speak for themselves.

We could change the world tomorrow if all the millions of people around the world acted the way they believe.

So long as we continued to attach more importance to our own narrow group membership than to the 'global village' we would propagate prejudice and ignorance. There was absolutely no harm in being part of a small group - indeed, with our hunter-gatherer band mentality it gave comfort, provided us with an inner circle of friends who could be utterly trusted, who were absolutely reliable. It helped give us peace of mind. The danger came only from drawing that sharp line, digging that ditch, laying that minefield, between our own group and any other group that thought differently.

I think anything is better than war. The extent to which one can negotiate with fanatics, I have no idea. I don't know.

Primates are very territorial. It is in their nature to protect their food resources as well as their females and young.