Emancipation is always at risk from the usual sources—demagogues, civil and international war, the tenure that superstitions have over the human imag… - A. C. Grayling

We can therefore all demand apologies from one another for mankind’s turpitude. But it is better worth remembering that we poison the present by our self-imposed slavery to unforgivingness over offences of the past—and that this explains almost all conflicts, from Northern Ireland via the Balkans to Kashmir. That is a form of slavery which we desperately need to abolish too.

The recent discovery that humans have only twice as many genes as fruitflies has tipped the balance in the nature-nurture debate back to nurture. On this evidence it is our culture, history and belief-systems which make us what we are. We look at the rest of nature and see carnivores killing to eat, but we do not see zebras forming armies to wage war on gnus. It is only humans, with their congenital vice of inventing differences of politics and faith, who murder one another because they disagree. And what makes the tragedy more poignant is that the less secure their grounds for belief, the more anxious and violent their adherence to it—and the greater their readiness to kill and die in its defence.

Four kinds of answer are standardly given to the question why religion exists. One is that it provides explanations—of the origin of the universe, of the way it works, of the apparently inexplicable things that happen in it, and of why it includes evil and suffering. Another is that religion provides comfort, giving hope of life after death, providing reassurance in a hostile world, and a means (by supplication, propitiation, and the practice of one or another form of prescribed behaviour) to get a better deal in it. A third is that it makes for social order, in promoting morality and social cohesion. And a fourth is that it rests on the natural ignorance, stupidity, superstitiousness and gullibility of mankind.