The Anthropocentric Conceit and the Long Demotion

Every pre-scientific picture of the world put human beings at the centre of it. Not near the centre, not among the important things — at the centre, as the point of the exercise. The cosmos was arranged around our planet. Life was created for our use. The moral order of the universe was addressed to our conduct. Even the calamities were about us: the flood was a judgement on human wickedness, the plague a punishment, the comet a warning meant to be read.

And every major advance in our understanding since has been, without exception, a demotion. That pattern is worth staring at directly, because the pattern itself is the strongest evidence we have that the original picture was not a discovery but a projection.

The Sequence

The demotions came in order, each one taking away a different piece of the centrality.

Copernicus took the location. The earth is not the centre around which everything turns; it is one planet among several, orbiting an ordinary star. Later this got worse rather than better: the sun is one of a few hundred billion stars in this galaxy, and the galaxy is one of perhaps two trillion. There is no centre, and if there were, we would not be at it.

Darwin took the separateness. We are not a distinct creation set above the animals but a branch of the same tree, cousins to every living thing, descended from ancestors who would strike us as unremarkable animals. The relationship is not metaphorical. It is written in the shared genetic code, in the vestigial structures, in the fossil sequence, and in the fact that the same genes doing the same jobs turn up in a fly.

Geology and cosmology took the timescale. Human history is not the story of the universe; it is a rounding error at the end of it. Thirteen point eight billion years for the universe, four and a half billion for the earth, a few hundred thousand for anatomically modern humans, and a few thousand for everything we call civilisation. If the age of the earth were a single year, all of recorded history would occupy the final half-minute.

Neuroscience took the inner sanctum. Whatever else it is, the mind depends utterly on the physical brain. Damage a specific region and a specific capacity goes — language, face recognition, the ability to form new memories, the capacity for moral restraint. Personality itself can be altered by injury, tumour, or chemistry. This is the most intimate demotion of the four, because it comes for the last thing anyone thought was safely ours.

Biology took even the body. You are not a unit. You are an assemblage carrying roughly as many bacterial cells as human ones, with mitochondria in every cell that were once free-living organisms, and stretches of viral DNA in the genome that arrived as infections and stayed.

The Direction Never Reverses

Here is the part that does the argumentative work. It is not simply that we have been demoted repeatedly. It is that the demotions run in one direction only.

Not once has a major finding come back and said: on closer inspection, humans really are the centre of this. There has been no discovery that the earth occupies a privileged position after all, no evidence that our species stands outside the tree of life, no result showing that the mind operates independently of the brain. In four centuries of very hard looking, the traffic has been entirely one way.

A hypothesis that is repeatedly corrected in the same direction was not a hypothesis. It was a bias, and what we have been doing is subtracting it. When your errors are randomly distributed, you have a measurement problem. When they all lean the same way, you have a systematic one — and the fix is not to keep adjusting but to identify the source of the lean.

Where the Lean Came From

The source is not mysterious. We are the only species we know of that constructs worldviews, and we build them from the only vantage point available: the inside of a human head.

Everything that makes the anthropocentric picture feel natural is an artefact of that vantage point. The sky appears to turn around us because we are standing on the thing that is turning. Our own concerns feel like the most important concerns because they are the ones we can feel. Human minds seem categorically different from animal minds because ours is the only one we have direct access to. Agency looks like it is everywhere because we are exceptionally good at detecting agents — a talent that pays off enormously when the rustle in the grass really is a predator, and costs almost nothing when it is only the wind.

Put those together and you get, automatically and without anyone deciding it, a universe centred on people, run by agents, addressed to us. It is what any species with our cognitive equipment and no telescopes would come up with. That it was arrived at independently in nearly every culture is not evidence that it is true. It is evidence that it is what this kind of brain produces when it has no way to check.

The Conceit Under New Management

The obvious reply is that we already know all this, and that educated people abandoned anthropocentrism some time ago. But it is more durable than that, and it survives by changing costume.

It is still there in the fine-tuning argument — the claim that the constants of physics were set so that we could exist, which is the medieval picture with the arithmetic updated. It is there in the assumption that extraterrestrial intelligence, if we find it, will be recognisably like us in motive and psychology. It is there in the habit of treating consciousness as the universe's central mystery specifically because it is our most salient feature. It is there every time a natural disaster prompts the question of what it means, as though the plate boundary had a message.

And it appears in secular versions too. The conviction that human beings are the inevitable endpoint of evolution — that intelligence was somehow the goal all along — is the same conceit wearing a lab coat. Evolution has no goals. Intelligence of our sort has arisen once, late, in one lineage, and there is nothing in the mechanism that was aiming at it.

Why This Is the Better Story

The reflex is to hear all this as diminishment, and it is worth saying plainly why it is not.

The demotions were not losses. Each one was the price of an enormous gain in understanding, and we came out of every exchange knowing vastly more than we went in with. We gave up the centre of the cosmos and received the actual cosmos: its scale, its age, its history, the composition of stars we will never reach. We gave up separateness from the animals and received an account of where we came from that is deeper and stranger than any origin myth. We gave up the immaterial soul and received an organ so intricate that we have barely begun to map it.

There is also something worth having in the position we ended up in. Being a late, contingent, thoroughly natural product of a process that was not aiming at us makes our existence more remarkable, not less. Nobody arranged it. It happened anyway. And we are, as far as we know, the part of the universe that has managed to turn around and work out what it is made of — which is a far stranger distinction than being told in advance that we were the point.