I know what I'm having 'em put on my tombstone: 'I have nothing more to say'.

I travel a lot. I'm on the move.

The worst thing you can do if you want to start a fight is to use derogatory terminology.

Over-population is the 'cause of drive-by shootings' and other social ills, but the root of the problem is Christianity, which posits that people are more important than sea otters and elephants.

We'll be eight degrees hotter in ten -- not ten, but thirty or forty years, and basically none of the crops will grow. Most of the people will have died and the rest of us will be cannibals.

We're too many people; that's why we have global warming...on a voluntary basis, everybody in the world's got to pledge to themselves that one child is it.

To be happy in this world, first you need a cell phone and then you need an airplane. Then you're truly wireless.