The third chimpanzee
Diamond uses his experience of life in Papua New Guinea to good effect. His friendships with people who remember a stone-age like existence before their meeting with the rest of the world add several interesting anecdotes.
The subject of evolution of human behaviour is a controversial one, and indeed sometimes Diamond seems to be being controversial just for the sake of it. On the question of environmental damage, he sometimes seems to be supporting a 'back to nature' approach, but in the end his conclusion is that it is our innate behaviour that is causing the problem and that a change from old ways is required for the future.