If you go from the USA - which, relative to the rest of the world, is in pretty good shape in terms of biodiversity and sustainability - to the tropics, everything gets worse. You have Indonesia, which is destroying its own forest. In West Africa there's no control whatsoever. It's a global situation. For that reason it ties in clearly with the needs and relationships of low-income countries.

Human nature is deeper and broader than the artificial contrivance of any existing culture.

In 2010, my two Harvard mathematician colleagues and I dismantled kin-selection theory, which was the reigning theory of the origin of altruism at the time.

Overall, the human brain is the most complex object known in the universe - known, that is, to itself.

Jehovah had nothing to say to Moses and the others about the care of the planet. He had plenty to say about tribal loyalty and conquest.

The great challenge of the twenty-first century is to raise people everywhere to a decent standard of living while preserving as much of the rest of life as possible.

If someone could actually prove scientifically that there is such a thing as a supernatural force, it would be one of the greatest discoveries in the history of science. So the notion that somehow scientists are resisting it is ludicrous.