The Evolutionary Origin of Useless Thoughts
The evolutionary origin of useless thoughts and the creative cost of thinking them
A phone call can destroy your nervous system in under three seconds. You don’t decide to be afraid. You don’t reason your way into dread. You hear the news and cortisol is already flooding your bloodstream, heart rate spiking, the fine hairs on your forearm standing at attention.
State is upstream of thought. Not the other way around.
The first thought a human ever had was not “I think, therefore I am.” It was closer to: fruit, but last time, lion.
First you had reflexes. When sunlight hits a microbe, it wiggles away. No thought or picture. Just a wire. That worked fine for centuries.
Then came drives like hunger, thirst and fear. Not yet a thought, but an internal signal that said “search” instead of “grab.” That bought the animal a little flexibility — it could poke around instead of just reacting. You weren’t “thinking” as a baby.
Then a brain got big enough to hold a thing that wasn’t there. To pause between stimulus and response and run a private simulation.
Evolutionary psychologists call this decoupled representation — the brain’s ability to manipulate symbols of things that are not currently in front of you. To run a private simulation of a future you cannot see.
Before language, some ancestor’s nervous system invented a new trick: it could pause between stimulus and response, run a quick movie of “what happens if I go there,” and update behaviour accordingly. The animal that could simulate didn’t need to touch the fire twice. That was the competitive advantage. The edifice of human civilisation is downstream of that biological novelty: the capacity to think about a thing before doing the thing.
And once you can simulate one possible future, you can simulate a thousand. That’s where planning comes from. Culture. Technology. All of it.
Simple so far. Here’s where it gets expensive.
The same system that once kept your ancestors alive now keeps you stuck. You don’t get paid to win an argument with your boss. You don’t get healthier for stressing about a diagnosis you don’t have. You don’t get happier for pre-living a tragedy that never arrives. You don’t get closer to anyone by rehearsing what you should have said three years ago. You don’t build a single thing by mentally drafting the perfect comeback to a person who isn’t thinking about you.
Yet you do it, because the brain can’t tell the difference between solving a real problem and completing an imaginary one. So it takes the easy win. Every time. Dopamine for fiction. Cortisol for nothing. Calories burned on a movie starring no one. The result is exhaustion from problems that don’t exist, and you’re too tired to fix the ones that do.
The brain evolved for problems that no longer exist. With no lion to outrun, it builds one from whatever material is available. Your inbox. Your reputation. The conversation from three years ago.
There is a drug common among people who invent imaginary problems. Its chemical name is 3,4‑dihydroxyphenethylamine. Hospitals administer it intravenously to patients in cardiac shock. Your brain administers it to itself, automatically, every time you anticipate a resolution — real or imagined. You know it as dopamine.
Dopamine is not pleasure. It is wanting. The neuroscientist Kent Berridge depleted rats of brain dopamine but they still liked sugar — they just stopped seeking it. Wanting without liking.
Your brain produces wanting on demand — for an argument you win in your head, for a conversation that never happens, for a future that exists only in the dark of your skull. You want intensely, compulsively, for years. You never arrive anywhere. The drug is free. The pharmacy is inside you. And the product it sells is not satisfaction. It is the anticipation of satisfaction, manufactured from nothing, delivered to no one.
The brain’s logic here is impeccable. If the end result of everything you chase — love, money, thrill, recognition, sex — is a handful of chemicals released in your skull, then the cheapest path to those chemicals is a sound strategy. The brain found it. The imaginary argument you win, the future success you pre-live, the version of yourself that finally gets understood — these release the same chemicals as the real thing. The problem is that a reward with no external monument has no resting point. It leaves no trace in the world. No changed reality. No proof outside your skull. So the loop continues — because an untethered reward demands to be repeated. It stays open because you never actually did anything in the real world, and for all the dopamine your brain has invested, it sees nothing to show for it.
Overdose does not kill you, at least not directly. It looks like this: you open a document. Read the same paragraph four times because you weren’t present in the last three. Open a new tab. Close it. Open the paper again. The cursor blinks. The sun moves across the floor. You have done nothing. You feel exhausted. That is functional paralysis.
Withdrawal feels like boredom. But not the mild kind. Your hand reaches for the phone because the absence of the drug is a physical weight. You sit in the weight. Most people cannot. They self-medicate within minutes. That is relapse.
You have heard of dopamine detox. Delete the apps. Throw the phone in a drawer. Eat clean. Cold showers and morning sunlight. Good. But watch what happens. Within hours, you are mentally rehearsing an argument with someone who isn’t there. Within days, you are running simulations about a future that will never arrive. The phone was not the source. The phone was a fake ID dealer. The mind is the source. The mind writes the prescription. The mind presents the ID. The mind is the addict and the addiction. Cut off one dealer, the mind finds another.
There is a region in your brain called the default mode network. It activates when you are not focused on anything in particular. It turns out it is furiously active — constructing your autobiography, simulating other people’s minds, projecting possible futures, running the continuous internal monologue that you experience as your “personality.”
And here is the problem: it never shuts up.
In ancestral environments, this network activated intermittently. There was genuine downtime. Attention was demanded by the immediate world — the hunt, the fire, the river, the infant, the stranger at the edge of camp. The me-machine rested because reality kept interrupting it. Now, the opposite. We have engineered away most of the genuine interruptions. The body is safe. The food arrives. The predators are gone. So the me-machine runs twenty-four hours, projecting threats that don’t exist onto a screen that never turns off.
“When you are drowning, you are not thinking about yourself. Those thoughts disappear. What remains is the problem and everything needed to solve it. You do not stop to ask yourself ‘would it work out?’ or calculate your probability of survival. You flail and fight for your life, probability be damned.”
Everyone has experienced the other state. The zone. The flow. The writer who looks up and three hours have dissolved. The coder who blinks and it’s dark outside. The athlete in the last quarter who reports afterward that they weren’t thinking — they were doing, purely, without the running commentary of self-evaluation. This state has a technical name in neuroscience: transient hypofrontality. The prefrontal cortex — the region responsible for self-monitoring, future simulation, social comparison — goes quiet. The older, faster, pattern-recognition systems take over. And paradoxically, performance improves.
The interference was the problem all along. Removing it was the solution. Flow is not a state you achieve. It is what you are when you stop obstructing yourself.
The Zen teachers called this “no mind.” They wrapped it in robes and ritual. The neuroscientists called it transient hypofrontality and wrapped it in a paper. Both are describing the same thing. The difference is the Zen teacher didn’t need an fMRI to find it.
Thoughts arrive the way weather arrives. The good ones and the bad ones come through the same door. The involuntary nature of good ideas is not a happy accident. It is the mechanism. And it means the door cannot be locked. You cannot shut out the noise without also shutting out the signal. The only power you have is which ones you turn toward.
So the question is not how to think better. The question is which thoughts are worth thinking at all.
My definition of a dumb question is this: “If my answer is yes, what will you do? If my answer is no, what will you do?” If my answer does not change your behaviour, then your question is dumb.
A thought is dumb if it does not change your next action.
Simply non-yielding — a computation that consumes cycles of glucose and returns nothing. It’s a taboo, a waste of the spaghetti and supplements you ingested in the morning.
This includes most of what people call “analysis.” The student who can articulate the seventeen dimensions of their procrastination is still procrastinating. The entrepreneur who spends a week modelling market scenarios instead of calling a customer has done excellent work on a painting of a bridge.
Attention is finite. Working memory holds roughly four things at once. Every cycle spent on a non-actionable simulation is a cycle not spent solving the actual problem. Rumination does not destroy lives in a day. It steals them quietly, compoundly, like a small leak in a great ship. You do not notice the leak until you’re about to sink.
Seeking an explanation for something that wouldn’t change your behaviour is pointless. If you wouldn’t sit down and calculate the number of ways a piece of paper can be squeezed, why do you sit down to think about things like what would happen if you were born in a different country?
Explanation feels like resolution. It is a neurochemical forgery. You get the payout without paying the tax. You get the sensation of having moved without having gone anywhere, because there’s no friction in your head. And so the habit deepens.
Every year, the explanation gets more sophisticated. The life stays the same. Meanwhile, some much less articulate person who couldn’t explain why they tried something just built the thing you can perfectly diagnose the flaws in.
The failure mode of intelligence is not stupidity. It is the ability to construct a sufficiently convincing explanation for not acting. The smarter you are, the more elaborate the cage you can build around yourself, and the more convinced you can be that the cage is a cathedral.
Intelligence is not a scalar quantity. It is a vector. A compass needle that points nowhere is not a more sophisticated compass because it can spin faster. A supercomputer running an infinite loop is a space heater. The variable that matters is not magnitude — it is whether the processing is aimed at a problem that accepts solutions, and whether your next action is closer to a solution than your last one.
“Chess has a tiny number of degrees of freedom compared to reality: only 64 squares, no fog of war, no tech tree, no terrain differences, same starting pieces and positions every time, and you can’t invent new pieces during the game. So it may seem like someone is close to checkmate in reality, but that doesn’t matter if they suddenly vaporize the opponent’s king with lasers from space that never existed before.” — Elon Musk
There are no openings to study in life. The board changes while you’re deciding. The rules are not fixed.
Even within chess, within its the closed system and fixed rules — seeing “ten moves ahead” is not how mastery works. (see the thinking matrix in this essay.)
Most people’s idea of predicting the future is the professor in Money Heist; thirteen contingencies mapped, every variable accounted for, the plan unfolding exactly as designed with just enough friction to seem realistic. Or Sherlock Holmes reading your whole life from your shoelaces.
It doesn’t work that way, because the variables multiply faster than the brain can track. You can’t see the entire jigsaw puzzle from just one piece.
Lastly, there is no technique for thinking.
Technique and genuine thinking are antonyms. When you are following a method, you are executing, not thinking. When you are genuinely thinking — when something new forms — you are not following a procedure. The productivity frameworks, the morning routines, the second-brain systems: these are, at best, ways of creating conditions. They are not the thing itself. You cannot method your way to a genuine insight, because a genuine insight is by definition something the method did not anticipate.
Which means everything in this essay is pointing at one thing: removing what blocks the process, not installing a new one. The capacity to see clearly, to make connections, to produce something new — this is not acquired. It is uncovered. The work is subtraction, not addition. The good ideas come through the same door as the bad ones. The interference is what turns your head toward the bad ones. Remove the interference and you become, in the only sense that matters, more creative.
The capacity for thought is the most extraordinary thing to have emerged from four billion years of trial and error. Language, mathematics, music, the entire architecture of everything you have ever loved — all of it built from that first private simulation some ancestor ran before approaching a tree. The machinery is staggering. The tragedy is not that people don’t use it. It is that most people use it almost entirely for avoidance, for status, and for the anticipation of rewards that simulation keeps promising but can never deliver. Because simulation is not reality. Wanting is not arriving.
You do not need more mindset. You do not need a better explanation. You need to stop negotiating with the mind.
The only honest test of intelligence is not what you can explain. It is not the quality of your models or the sophistication of your diagnoses. It is whether you are getting more of what you actually want. If the gap between your processing power and your outcomes is large, the problem is not ability. It is direction.
