Civilization in its present form hasn't got long.

I've got personal views on the '60s. You can't have freedom without paying the price for it.

Life does more than adapt to the Earth. It changes the Earth to its own purposes.

China will soon emit more greenhouse gases than America, but its regime knows if it caps aspirations there will be a revolution.

Science always uses metaphor.

I don't think we're yet evolved to the point where we're clever enough to handle a complex a situation as climate change. The inertia of humans is so huge that you can't really do anything meaningful.

There is little evidence that our individual intelligence has improved through recorded history.