It takes a certain ingenuous faith - but I have it - to believe that people who read and reflect more likely than not come to judge things with liberality and truth.

Christian churches and Muslim groups have no more right to have their say than women's institutes or trades unions. The government has actively encouraged faith-based education, and therefore given a megaphone to religious voices and fundamentalists.

Everybody is entitled to believe. Churches have exactly the same right to exist as a football club, a trade union or a political party. But if you and I set up the Church of the Fairies of the Garden, then I don't think we should automatically be meeting the queen, be entitled to seats in the House of Lords or get public money for our fairy schools.

Misuse of reason might yet return the world to pre-technological night; plenty of religious zealots hunger for just such a result, and are happy to use the latest technology to effect it.

Nowadays, by contrast, Christianity specialises in soft-focus mood music; its threats of hell, its demand for poverty and chastity, its doctrine that only the few will be saved and the many damned, have been shed, replaced by strummed guitars and saccharine smiles. It has reinvented itself so often, and with such breathtaking hypocrisy, in the interests of retaining its hold on the gullible, that a medieval monk who woke today, like Woody Allen's Sleeper, would not be able to recognise the faith that bears the same name as his own.

Eagleton has spent his life inside two mental boxes, Catholicism and Marxism, of both of which he is a severe internal critic—that is, he frequently kicks and scratches at the inside of the boxes, but does not leave them. Neither are ideologies that loosen their grip easily, and people who need the security of adherence to a big dominating ideology, however much they kick and scratch but without daring to leave go, hold on to it every bit as tightly as it holds onto them. The result is of course strangulation, but alas not mutual strangulation: the ideology always wins.

Humanism is the philosophy that you should be a good guest at the dinner table of life.