Ages of Gaia: A Biography of Our Living Earth, Paperback

Lovelock argues that such things as the level of oxygen, the formation of clouds, and the saltiness of the oceans may all be controlled by biological processes. He believes that "living organisms create the optimum conditions for their own existence, and in so doing create the superorganism Gaia."The New York Times Book Review has called his arguments in favor of Gaia "plausible and above all illuminating.