Dominant Mammal: The Biology of Human Destiny - Sir Macfarlane Burnet

Dominant Mammal is then, a biologist's view of the human situation, but that outlook is still a humane one. The author can no more see the future than anyone else. He finds himself swinging between optimism and pessimism, and his final question is: how long must humanity's " continue before it reaches one of its only two alternative endings: extermination or a stable human ecosystem?