As Malaparte saw it, Naples was a pagan city with an ancient sense of time. Christianity taught those who were converted to it to think of history as the unfolding of a single plot - a moral drama of sin and redemption. In the ancient world there was no such plot - only a multitude of stories that were forever being repeated. Inhabiting that ancient world, the Neapolitans did not expect any fundamental alteration in human affairs. Not having accepted the Christian story of redemption, they had not been seduced by the myth of progress. Never having believed civilization to be permanent, they were not surprised when it foundered.

For those who live inside a myth, it seems a self-evident fact. Human progress is a fact of this kind. If you accept it you have a place in the grand march of humanity. Humankind is, of course, not marching anywhere. 'Humanity' is a fiction composed from billions of individuals for each of whom life is singular and final. But the myth of progress is extremely potent. When it loses its power those who have lived by it are - as Conrad put it, describing Kayerts and Carlier - 'like those lifelong prisoners who, liberated after many years, do not know what use to make of their freedoms'. When faith in the future is taken from them, so is the image they have of themselves. If they then opt for death, it is because without that faith they can no longer make sense of living.

Instead of enabling humans to improve their lot, science degrades the natural environment in which humans must live. Instead of enabling death to be overcome, it produces ever more powerful technologies of mass destruction. None of this is the fault of science; what it shows is that science is not sorcery. The growth of knowledge enlarges what humans can do. It cannot reprieve them from being what they are.

Cheating ageing by a low-calorie diet, uploading one's mind into a super-computer, migrating into outer space ... Longing for everlasting life, humans show that they remain the death-defined animal.

Before Christianity suicide was not in any way troubling. Our lives were our own, and when we tired of them we were at liberty to end them. One might think that as Christianity has declined, this freedom would be reclaimed. Instead secular creeds have sprung up, in which each person's life belongs to everyone else. To hand back the gift of life because it does not please is still condemned as a kind of blasphemy, though the offended deity is now humanity instead of God.

Evangelical atheists preach the need for a scientific view of things, but a settled view does not go with scientific method. If we know anything it is that most of the theories that prevail at any one time are false. Scientific theories are not components of a world-view but tools we use to tinker with the world.

Though it is often assumed that naturalism must be hostile to religion, the opposite is true. Enemies of religion think of it as an intellectual error, which humanity will eventually grow out of. It is hard to square this view with Darwinian science - why should religion be practically universal, if it has no evolutionary value?

For a consistent naturalist science can only be a refinement of animal exploration, a practice humans have devised for finding their way in the bit of the universe in which they have so far survived. Instead of thinking of science as a law-seeking activity, we can think of it as a tool humans use to cope with a world they will never understand.

If our universe is one of many, unlike others in containing observers like ourselves, there is no need to posit a designer. Most universes will be too chaotic to allow the emergence of life or mind. In that case, the fact that humans exist in this universe needs no special explanation.

The irony of scientific progress is that in solving human problems it creates problems that are not humanly soluble. Science has given humans a kind of power over the natural world achieved by no other animal. It has not given humans the ability to remodel the planet according to their wishes. The Earth is not a clock that can be wound up and stopped at will. A living system, the planet will surely rebalance itself. It will do so, however, without any regard for humans.