A Universe That Was Expecting Us

In the last reflection we followed the bare fact of existence down to something that must simply be — a necessary ground beneath everything contingent. But that argument tells us only that something exists. It does not yet tell us whether that something is a mind or a mechanism, whether it meant anything by us. For that we have to look not at the fact that the universe exists, but at what kind of universe it is. And when we look closely, it turns out to be strange in two ways that are very hard to explain if it is merely an accident.

The dials were set

Modern physics has uncovered something its discoverers did not expect and often did not welcome: the universe appears to be balanced on a knife's edge. The laws that govern it contain a handful of numbers — the strength of gravity, the force binding atomic nuclei, the energy woven into empty space, the masses of the basic particles — and these numbers could, as far as physics can tell, have taken almost any value. What is startling is how precisely they are set. Nudge many of them by a hair and you do not get a different universe with different life. You get no life at all: no stars, no chemistry, no complexity, nothing that could ever wake up and wonder about it.

The margins involved are not close calls; they are staggering. The energy of empty space appears fine-tuned to something like one part in a number with more zeros than there are atoms in your body. Shift gravity by a fraction of a fraction of a percent and stars either never ignite or burn out long before anything could live beside them. Physicists with no interest whatsoever in religion have called this the most extraordinary feature of the cosmos. Fred Hoyle, an atheist, said the universe looked like "a put-up job." The dials, against every expectation, sit exactly where they must for us to be here reading about them.

The escape hatch, and where it leaks

There is a way out, and it deserves to be taken seriously. Perhaps there are countless other universes, each with its dials set differently, the overwhelming majority sterile and dead — and naturally we find ourselves in one of the rare ones that works, since we could not exist anywhere else. This is the multiverse, and it is not a foolish idea.

But it should be seen for what it is. There is no independent evidence for these other universes; by definition we cannot observe them. It is a vast, unprovable proposal — an ocean of unseen worlds — invoked precisely to avoid a conclusion. That is permitted. But let us at least be even-handed: the person who posits a Mind behind the fine-tuning and the person who posits endless unseen universes are both reaching past the physical evidence toward the explanation they find more reasonable. One of those explanations, at least, is of a kind we already know produces finely balanced arrangements aimed at an outcome. Minds do that. We watch them do it every day. We have never once observed a multiverse.

The second strangeness: the universe makes sense

Set fine-tuning aside, and a deeper oddity remains — one so familiar we have stopped noticing it. The universe is comprehensible. Its behaviour can be captured in mathematics: elegant, economical equations that a primate brain, evolved to find fruit and dodge predators, can nonetheless discover and understand. There is no obvious reason a mindless cosmos should be lawful at all, less reason still that its laws should be beautiful, and no reason whatever that our minds should happen to be tuned to read them.

Einstein said the most incomprehensible thing about the universe is that it is comprehensible. The physicist Eugene Wigner wrote of the "unreasonable effectiveness of mathematics" — the eerie way that abstract patterns dreamed up by mathematicians for their own sake turn out, decades later, to describe the actual machinery of nature. Why should reality answer to reason? Why should the book of the universe be written in a language its readers can learn?

If the universe is the work of Mind — if reason stands at the bottom of things — then all of this is exactly what we should expect: a rational world, ordered by a rational Maker, explored by creatures made to share, however faintly, in that same reason. The intelligibility of nature is not a lucky bonus. It reads like a signature.

What the evidence is shaped like

None of this is proof in the geometric sense, and I promised at the outset not to pretend otherwise. It is evidence, and evidence has a shape. Walk into a room where the temperature is held exactly comfortable, the books are in a language you happen to read, and the whole place seems arranged for a guest — you may insist it all fell together by accident, but you would not bet that way about anything else in life. You would conclude, quite reasonably, that someone was expecting you.

The universe is that room. It did not have to be lawful, and it did not have to be legible, and it certainly did not have to be balanced so finely that beings capable of reading it could arise inside it. The believes-anything spirituality that treats the cosmos as a warm, impersonal haze has no account of why it is so exactly engineered. The strict materialism that treats it as blind accident must keep conjuring unseen worlds to keep the accident plausible. The oldest explanation remains the simplest: behind the finely set, deeply intelligible universe stands a Mind that set it and meant it. We are not gatecrashers in an accident. We were expected.