I urge you to read Eternal Treblinka and think deeply about its important message.

The problem of the chimps is that they can only sit and look. They can't discuss what they feel. All that feeling is trapped within each one.

A book came out recently written by scientists and environmentalists that made me so angry. It said the only thing we have to worry about is big industry. Each individual who tries to make his or her own environment better is useless. I find this criminal, because then you have a billion people all saying, It doesn't matter what I do because I'm just one person. But if you turn that around and a billion people say, What I do does make a difference, then it will make a difference.

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.

What makes us human, I think, is an ability to ask questions, a consequence of our sophisticated spoken language.

If you consciously say 'I won't do it!' to yourself, then you have a good chance that you won't.

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.