I think we certainly benefit from social institutions which encourage us towards moral behavior. It's very important to have law. It's very important to have a moral education.

As my colleague, the physical chemist Peter Atkins, puts it, we must be equally agnostic about the theory that there is a teapot in orbrit around the planet Pluto. We can't disprove it. But that doesn't mean the theory that there is a teapot is on level terms with the theory that there isn't.

We are going to die, and that makes us the lucky ones. Most people are never going to die, because they are never going to be born. The number of people who could be here, in my place, out number the sand grains in the Sahara. If you think about all the different ways in which our genes could be permuted, you and I are quite grotesquely lucky to be here. The number of events that had to happen in order for you to exist, in order for me to exist... we are privileged to be alive and nd we should make the most of our time on this world.

Along with William Shakespeare and Isaac Newton, Charles Darwin is Britain's greatest gift to the world. He was our greatest thinker.

Superficially it's a problem if homosexuality is genetic - if the difference between people's sexual preferences is genetic - because at least a pure homosexual would be unlikely to reproduce and therefore pass on the genes. So the first question you ask is, is it actually genetic, and the answer is probably to some extent yes.

Ideally, I'd like everybody to be secular.

People who criticize The Selfish Gene like that often haven't read it. The selfish gene accounts for altruism toward kin and individuals who might be in a position to reciprocate your altruism.