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

The world has not warmed up very much since the millennium.

Humans are too stupid to prevent climate change from radically impacting on our lives over the coming decades.

We are in a fool's climate, accidentally kept cool by smoke, and before this century is over billions of us will die and the few breeding pairs of people that survive will be in the Arctic where the climate remains tolerable.

Civilization in its present form hasn't got long.

I'm not a pessimist, even though I do think awful things are going to happen.

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