We have the power to defy the selfish genes of our birth and, if necessary, the selfish memes of our indoctrination. We can even discuss ways of deliberately cultivating and nurturing pure, disinterested altruism - something that has no place in nature, something that has never existed before in the whole history of the world. We are built as gene machines and cultured as meme machines, but we have the power to turn against our creators. We, alone on earth, can rebel against the tyranny of the selfish replicators.

People sometimes say that you must believe in feelings deep inside, otherwise you'd never be confident of things like 'My wife loves me'. But this is a bad argument. There can be plenty of evidence that somebody loves you. All through the day when you are with somebody who loves you, you see and hear lots of little tidbits of evidence, and they all add up. It isn't purely inside feeling, like the feeling that priests call revelation. There are outside things to back up the inside feeling: looks in the eye, tender notes in the voice, little favors and kindnesses; this is all real evidence.

Some people find clarity threatening. They like muddle, confusion, obscurity. So when somebody does no more than speak clearly it sounds threatening.

The mob hysteria over pedophiles has reached epidemic proportions and driven parents to panic. Today's Just Williams, today's Huck Finns, today's Swallows and Amazons are deprived of the freedom to roam that was one of the delights of childhood in earlier times (when the actual, as opposed to the perceived, risk of molestation was probably no less).

I read in the paper today the list of the most popular boys' names in Britain. The first was Jack, the second was Mohammed. That makes me feel a little bit worried.

So Occam's razor - Occam says you should choose the explanation that is most simple and straightforward - leads me more to believe in God than in the multiverse, which seems quite a stretch of the imagination.

To me, the right approach is to say we are profoundly ignorant of these matters. We need to work on them. But to suddenly say the answer is God - it's that that seems to me to close off the discussion.