Our brain is almost the same as the chimps', but we have language, we have electronic communications, we've put people on the moon - we are immensely more intelligent. And yet: how come the being with the most extraordinary intellect ever is destroying its only planet?

Terrorism is fueled by hate. The tragedy is that there are countless young children who are being taught to hate. Terrorism is usually fueled also by poverty.

We find animals doing things that we, in our arrogance, used to think was "just human".

To me, cruelty is the worst of human sins. Once we accept that a living creature has feelings and suffers pain, then by knowingly and deliberately inflicting suffering on that creature, we are guilty, whether it be human or animal.

Every individual matters and has a role to play in this life on Earth.

Mainly because as women's education increases all around the planet, we find that family size tends to drop.

What makes us human, I think, is an ability to ask questions, a consequence of our sophisticated spoken language.