It's not that humans and non-humans are identical... but the lack of understanding that led to the slave trade is the same lack of understanding many people have about animals today. When slaves were brought over from Africa, many people believed they were not humans, that they didn't have feelings. Many people believe that primates and other animals don't have feelings, too, but they do.

I believe that we have more capability than any other creature to control our biological inheritance - and we do so most of the time.

However much you know giraffes, to see one in the wild for the first time feels prehistoric.

From my perspective, I absolutely believe in a greater spiritual power, far greater than I am, from which I have derived strength in moments of sadness or fear. That's what I believe, and it was very, very strong in the forest.

Never be arrogant or abrasive. Treat your opponent respectfully if they really and truly believe they are right.

If you educate women, family size tends to go down.

You may not believe in evolution, and that is all right. How we humans came to be the way we are is far less important than how we should act now to get out of the mess we have made for ourselves.