Why is there something rather than nothing? It’s meant to be the great unanswerable question. It’s certainly a poser. It would have been simpler if there’d been nothing: there wouldn’t be anything to explain.

Some people think that if we knew more, we’d see that there couldn’t have been nothing. That wouldn’t surprise me. Others go further: they think we’d see that there couldn’t have been anything other than just what there is: this very universe, containing just the kind of stuff and laws of nature it does contain. That wouldn’t surprise me either, nor – I suspect – Einstein: “What really interests me,” he said, “is whether God had any choice in the creation of the world.” (Einstein’s God is a metaphorical device: “The word God is for me nothing more than the expression and product of human weaknesses.”)

Most people who ponder these things take a different view. They think the universe could in fact have been different. They think it’s puzzling that it turned out the way it did, with creatures like us in it. They are tempted by the idea that the universe has some point, some goal or meaning. In Why?, Philip Goff, professor of philosophy at Durham, argues for “cosmic purpose, the idea that the universe is directed towards certain goals, such as the emergence of life” and the existence of value.

I’m not convinced, but I’m impressed. Why? is direct, clear, open, acute, honest, companionable. It manages to stay down to earth even in its most abstract passages. I’m tempted to say, by way of praise, that it’s Liverpudlian, like its author.

The book has a double beat, like a heart: each chapter begins with a diastole, an admirably accessible section on its subject – consciousness, the point of life, the purpose of the universe (if any), the existence (or non-existence) of God – and closes with a systole, a more taxing “Digging Deeper” section.

Goff rules firmly against the traditional Christian God, omnipotent, omniscient and omnibenevolent – while backing the notorious “fine-tuning argument”, which goes roughly as follows: it’s so incredibly unlikely that a universe such as ours, containing life, consciousness and value, should have come into existence at all that we must suppose that some purpose has been at work, tuning things to come out as they have. It’s extremely hard to do this well, and Goff provides an intellectually aerobic primer on the logic of probability, and in particular the Bayes’ theorem, one of the core ideas of our day. His conclusion is as advertised in his title: nothing is certain, but the balance of evidence favours belief in cosmic purpose.

The question is genuinely difficult. I’m bothered by the fact that many of the arguments for fine-tuning depend on varying the fundamental physical constants (eg the charge on electrons) while holding the existing laws of nature fixed. I can’t see why engaging in this curious activity could ever be thought to explain anything, or support any interesting conclusion. And if – as Einstein and I suspect – nothing could possibly have been different, the fine-tuning arguments collapse, as Goff acknowledges. But his discussion is ingenious and illuminating.

In the chapter on consciousness, Goff brings up the standard view that there’s a radical difficulty in explaining its existence. I think that those who believe this have gone wrong right at the start: they think – quite wrongly – that they know something about the nature of matter that makes it mysterious that consciousness exists. Wrong. There’s no good reason to think this, as Goff agrees. The solution is to suppose (along with a good number of winners of the Nobel prize for physics) that consciousness in some form is built into the nature of matter from the start. This view is known as panpsychism, and Goff ends his discussion with “a prediction: panpsychism will, over time, come to seem just obviously correct”.

Why? is a rich book. It aims high and ends with some good political reflections. It’ll turn quite a few heads. It should get the discussion it deserves. I don’t for all that think the universe has a purpose. I think it just is.

It does, though, seem to have a taste for complication. The balance of evidence is a delicate thing, but it seems at present to favour the view that something is going on that isn’t fully accountable for by the laws of physics. It’s nothing to with “Nobodaddy” (William Blake’s name for the nonexistent Christian God), or any sort of goal, but Wittgenstein seems to be on the right track when he tries to express his sense of absolute or ethical value and finds it crystallised in one particular experience: “I wonder at the existence of the world”.

• Galen Strawson is a philosopher and author of Freedom and Belief (Oxford). Why? The Purpose of the Universe by Philip Goff is published by Oxford (£14.99). To support the Guardian and Observer buy your copy at guardianbookshop.com. Delivery charges may apply. From Friday 8 December 2023 to Wednesday 10 January 2024, 20p from every Guardian Bookshop order will support the Guardian and Observer’s charity appeal 2023.