Are You Really Smarter Than Someone From 20,000 Years Ago?

The phone in your pocket can answer nearly any question in three seconds. So here’s one it can’t settle: would you out-think a person who lived twenty thousand years ago?

I was certain I knew. No books, no schools, no wheels — obviously we win. Then, while making the video on this, the research kept flipping my answer, and by the end I felt like I owed a lot of very old people an apology.

This is the written version of my video on this question — watch that one if you prefer crayon. Stay here if you want the links.

The cartoon caveman is mostly fiction

Close your eyes and picture a “caveman.” You got the grunting guy with the club, didn’t you? So did I. That image comes from old illustrations and a century of cartoons, not from bones.

The bones tell a different story. Researchers have measured the insides of ancient skulls by the hundreds, and the people living through the last Ice Age had brains the same size as ours — frequently a little larger. Even Neanderthals, the poster children for “primitive,” carried skulls with as much room inside as yours. Whatever else separates us from them, raw hardware isn’t it.

Which raises the real question: if the equipment matched ours, what were they doing with it?

A stone blade runs on your language circuits

Start with the humblest thing they made: a sharp rock. Sounds like the easiest craft in history. It isn’t. Turning a lump of flint into a working blade means reading the stone, planning a sequence of strikes, and landing each one at a precise angle — and a single careless hit can wreck an hour of work. When modern volunteers try to learn it, they need months of practice, and plenty of them never get there.

Here’s the part that got me. In a 2012 brain-imaging study by Dietrich Stout and Thierry Chaminade, people were scanned while learning this exact skill, and the toolmaking recruited brain networks that overlap with the ones we use for language. Shaping a stone blade isn’t mindless banging. It leans on some of the same machinery as speech — and our ancestors were running that machinery hundreds of thousands of years before anyone wrote a word.

They aimed boats at a horizon with nothing on it

Now zoom out from a workbench to an ocean. Australia has been an island for millions of years — no land bridge, ever. Getting there meant real open-water crossings, past the point where the shore behind you disappears.

And people did it staggeringly early. Excavations at the Madjedbebe rock shelter, published as Clarkson et al., 2017 in Nature, put humans in northern Australia around 65,000 years ago. Think about what that requires: watercraft that hold together at sea, supplies for a trip of unknown length, and enough people to found a population on the far side. That’s not drifting on a lucky log. That’s a project — planned, provisioned, and pulled off tens of thousands of years before the first pyramid.

We put up statues for explorers with compasses and steel hulls. These folks did it with wood, cord, and a frankly alarming amount of nerve.

A story that outlived the shoreline it describes

The achievement that broke my brain, though, isn’t a tool or a voyage. It’s a memory.

Without writing, knowledge only survives if a living mind carries it and hands it on intact. So ancient people got terrifyingly good at exactly that. Patrick Nunn and Nicholas Reid, in a 2016 paper in Australian Geographer, collected Aboriginal oral traditions from around Australia’s coast that describe land now sitting under the sea — and matched them against the geological record of sea-level rise. The stories fit. Some appear to preserve details of coastlines drowned more than 10,000 years ago. That’s a message passed mouth to mouth, without a single written note, for longer than any library, empire, or file format has lasted.

How? They anchored knowledge to the world itself. A hill held a chapter; a river bend held a character; a route across country doubled as a table of contents. If that sounds like the “memory palace” trick modern memory champions use to hold thousands of digits — it is. They invented the technique because forgetting wasn’t an option.

Then I looked at my own phone

Here’s where it stopped being a history story for me. I don’t know my best friend’s number. My phone does. I’ve followed the little blue GPS dot down streets I’ve driven a hundred times. Birthdays, directions, recipes — a century ago all of that lived in someone’s head, and now most of mine lives in a device with a battery.

Psychologists call this cognitive offloading: handing pieces of thinking to machines so the brain doesn’t have to hold them. It isn’t automatically bad — offloading frees attention for other things. But it’s a trade, and I’d never once stopped to check the receipt. My ancestors couldn’t offload anything, because there was nothing to offload onto. Tracking, navigating, healing plants versus dangerous ones, next week’s weather in today’s clouds — every bit of it had to live in a human body and stay there.

Where the science is honestly still arguing

Time for the fine print, because this channel doesn’t do certainty it hasn’t earned. The Madjedbebe date is contested — some archaeologists argue the 65,000-year figure runs too old and prefer something closer to 50,000. Brain volume is a blunt measure, not an intelligence score; a bigger skull doesn’t grade anyone’s wit, and nobody has handed an Ice Age hunter a cognitive test. And the much-discussed stall — even dip — in average test scores across some wealthy countries in recent decades is real in several datasets but hotly debated in cause, with explanations ranging from schooling changes to screens to plain measurement quirks. Hold all of those loosely. The core claim survives anyway: the hardware hasn’t changed, and the old software was seriously impressive.

Same brain, different scaffolding

So, are you smarter than someone from 20,000 years ago? Wrong question, it turns out. You’re running the same model of brain they were — you’ve just wrapped it in supports they never had, and they used theirs in ways most of us never will. They looked at a rock and saw the blade inside it. They looked at open water and saw a route. They looked at the land and saw a library. I look at my phone roughly ninety times a day, and now I do it a little more sheepishly.

The trade we made isn’t a tragedy. But it’s worth knowing what got traded — and remembering that everything they had is still sitting in your skull, waiting for you to need it.

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