Lasting change is a series of compromises.

Well, in some ways we're not successful at all. We're destroying our home. That's not a bit successful.

We now know that the structure of the DNA in humans and chimpanzees differs by only just over one percent. You could even have a blood transfusion from a chimp, provided you have the same blood group.

The hardest part of returning to a truly healthy environment may be changing the current totally unsustainable heavy-meat-eating culture of increasing numbers of people around the world. But we must try. We must make a start, one by one.

Surely it should be a matter of moral responsibility that we humans, different from other animals mainly by virtue of our more highly developed intellect and, with it, our greater capacity for understanding and compassion, ensure that medical progress slowly detaches its roots from the manure of non-human animal suffering and despair.

People say, "Oh, we ought to fight for animal rights." We fought for human rights, but even if humans have rights, they can still be horribly abused and are every day. You don't have to go to some far off land, far away place; we have a lot of child abuse in our own society.

Maternal behavior helps when you have to be patient with nonverbal creatures.