Here’s an hypothesis. The energy which fires the new-style militant atheism comes far more from the biological rather than the physical sciences.

The obvious case in point would be Richard Dawkins. He certainly addresses the arguments from modern physics that some use to support theistic beliefs ??" fine-tuning, and so on. But he is more successful when he rests his case on the science of evolution. Similarly, whilst Dawkins makes TV programmes that launch full scale attacks on religion, with titles like ‘The Root of All Evil?’, cosmologists like Martin Rees make programmes with more modest titles, like ‘What We Still Don’t Know’. Moreover, Rees is quite content to entertain the probability that there are questions science can only fumble over, and never find an answer. It is hard to imagine Dawkins calling his agent burning with passion for a new book entitled ‘The Science Delusion’.

The theologian Paul Tillich is reported to have said that only physicists use the world ‘God’ without embarrassment. Alternatively, the theologian and philosopher Keith Ward told me that he is now receiving invitations to talk to university physics departments as a theologian. Moreover, they listen not just respectfully but with genuine interest.

Or there is the towering figure of Albert Einstein. He was quite happy to talk about ‘God’, though the exact nature of his religiosity is continually contested. Dawkins himself has said he regrets that Einstein used the G-word. And when earlier this year, a letter by Einstein came up for auction, in which he called God the ‘product of human weakness’, Dawkins was disappointed to have been out-bidden. It fetched £170,000.

However, Walter Isaacson, in his recent and excellent biography of Einstein, concludes that he was religiously-minded and probably an agnostic. Moreover, he believed that science was not possible without a religious sensibility. Einstein wrote:

Behind all the discernible laws and connections, there remains something subtle, intangible and inexplicable. Veneration for this force beyond anything that we can comprehend is my religion.

He concluded:

Science without religion is lame. Religion without science is blind.

And on the question of atheism, he averred:

What separates me from most so-called atheists is a feeling of utter humility toward the unattainable secrets of the harmony of the cosmos.

Now, there are exceptions that question my observation, of course. Robert Winston checks the boxes of both biologist and religious, being a well-known fertility scientist and practising Jew. He has talked of the similarities between science and religion because both talk the language of uncertainty. Alternatively, there is Steven Weinberg, an atheist and cosmologist. He can certainly pen a good line against religion. Having said that, in a now infamous review of ‘The God Delusion’ in the TLS, even he began by noting:

Of all the scientific discoveries that have disturbed the religious mind, none has had the impact of Darwin’s theory of evolution by natural selection. No advance in physics or even cosmology has produced such a shock.

Why? There are no doubt political reasons behind the biological nature of contemporary anti-religious zeal. The spread of Intelligent Design would be one, though that would be limited to America.

More philosophically, there could be reasons that stem from the differences between the sciences. Maybe physicists are more inclined to theistic interpretations, or at least less averse to them, because they deal with fundamental laws of nature. Like the notion of God, they value philosophical simplicity. Or perhaps the very simplicity of the laws raises the question of why the universe obeys identifiable laws in the first place, and how those laws are embedded in it.

Biologists, on the other hand, deal with the complexities of the natural world. Darwin has described a mechanism that accounts for such complexity. It renders old-style, Paley-like arguments about a divine designer redundant. So perhaps for this reason, biologists are more inclined to champion strictly mechanist explanations and reject those that appear to make the world more fuzzy.

Alternatively, biology in the 20th century has been very successful because it has stuck with strictly materialist and mechanistic explanations, as physics did in the 18th and 19th centuries. Now, though, the limitations of such an approach in biology are beginning to appear, as they did in physics with the birth of quantum mechanics. Hence we see the development of disciplines like systems biology and interest in evolutionary convergence.

If right, the implication of that would be that the biological nature of vocal atheistic science could turn out to be more of a high watermark than sign of a decisive victory of that reading of science over any other.