Athiest hedonism: Their poster campaign on London buses in 2009 was supported by Richard Dawkins (right). Its fatuous slogan gets to the heart of why people have turned away from biblical religion — not because it is irrational but because it puts constraints on their behaviour

To judge from what we are reading and hearing almost every day at the moment, it would seem Britain is in the throes of a war of religion. A war, that is, between religion and atheism. Professor Richard Dawkins, the Savanarola of atheism, regularly hurls his thunderbolts at believers. Christianity, says the church, is under siege. Christians are being prevented from wearing the crucifix at work, being barred from adoption panels. Even Delia Smith has now brought her rolling pin to the fight to defend the faith.  

At the heart of this great argument lies the assumption on the part of the anti-religion camp that this is a battle between reason and obscurantism, between rationality on the one hand and knuckle-dragging ignorance and prejudice on the other. And of course, that anti-religion camp is on the side of reason, and thus of intelligence, science, progress and freedom; whereas religious believers would undo the Enlightenment and take us all back to the dark ages of credulity, superstition and the shackling of the mind.

This assumption is based on a further given: that in the West this is the age of reason. And we think this, in large measure, because we have put religion, or faith, in a box labelled in very large letters, "Un-reason". Faith and reason, religion and science are supposedly inimical to each other. There is no overlap. They knock each other out.

So it follows that people who are intelligent can have no religious faith; those who are religious are either imbeciles or insane. Not only that, religious people are narrow, dogmatic, intolerant and unpleasant. Those with no religious faith are broad-minded, open, liberal and thoroughly splendid people whom you'd be delighted to meet at a dinner party. Little casts a chill over a fashionable table more than the disclosure that a guest believes in God. 

I have a rather different take on this great division of our age. My view is that while we may be in a post-biblical — and post-moral — age, we have not disposed of belief. Far from it. We have just changed what we believe in. Our society may have junked the Judaeo-Christian foundations of the West for secularism. But this has given rise to a set of other religions. Secular religions. Anti-religion religions.  

These are also based on a set of dogmas. They proselytise. They involve faith. But unlike the Judaeo-Christian thinking they usurp, these secular anti-religions suspend truth and reason. What's more, I would say that it was the Judaic foundations of the West which, far from denying reason, gave the world both reason and science in the first place.

God has been pronounced dead, and in his place have come man-made ideologies — in which people worship not a divine presence but an idea.