One cannot watch chimpanzee infants for long without realizing that they have the same emotional need for affection and reassurance as human children.

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.

Without the support of local people, you might as well give up because you can make all the noise you like, you can demarcate a national park, but if the people outside want to go creeping into a forest you really can't stop them. They've got to get a benefit.

We have turned away from the natural world. Instead, it's all about money and power.

Well, in some ways we're not successful at all. We're destroying our home. That's not a bit successful.

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

Just think of the trust that often exists in soldiers. Within their own unit, you could say they have to trust each other. A spirit of camaraderie builds up and, in the end, they will risk their lives for each other. They may even go so far as to dehumanise the other, enemy group - a mechanism you can also observe in chimps.