We start out postulating sharp boundaries, such as between humans and apes, or between apes and monkeys, but are in fact dealing with sand castles that lose much of their structure when the sea of knowledge washes over them. They turn into hills, leveled ever more, until we are back to where evolutionary theory always leads us: a gently sloping beach.

In Africa, we have the bush meat trade, which means that, on a very large scale, animals are being killed in the forests and sold in the cities as a luxury food.

Female bonobos form a strong sisterhood. They rule through female solidarity.

The chimpanzees could tear me apart in no time. They're many times stronger than we are.

We justify the inequalities by saying some people are just better and smarter than others and the strong should survive and the poor can die off.

Armies are a purely human invention. Most soldiers who go to war nowadays don't even do it because they're inherently aggressive.

We, who think like animals living in small groups, must structure a global world. We believe in universal human rights and believe racism and war are wrong. On the other hand, it is our nature to be cooperative and loving almost exclusively with the members of the group to which we feel we belong.