Never Satisfied: Why Your Brain Always Wants More

About the button in your head that resets everything you get to zero, and about the places where that button does not work.

Put an empty bowl on a kitchen scale. The display wakes up. 340 grams, it says. That is the bowl.

Now press the tare button. The number drops back to zero.

The bowl is still there. It has not lost a single gram. It simply no longer counts. From now on the scale weighs only what you put on top of it.

Your mind has a button like that. Every time you get something you longed for, it presses it. The house. The job. The phone in your pocket that you saved for months to buy. For a few weeks it counts. After that it becomes your new zero.

Think of the last time you got something you truly wanted. How long did it feel special? A week? A month? And when did you notice you had stopped looking at it?

That is the question of this piece. Why does almost every good feeling sink back to zero? And is that a fault in your head, or is it precisely what your head was built for?

The answer is less bleak than you think. It is also messier than the popular version of it. One of the most famous studies in this field has been firmly contradicted in recent years. That one comes later.

The tare button in your head

In 1971 the American psychologists Philip Brickman and Donald Campbell wrote a chapter about what they called hedonic relativism.¹ In plain language: pleasant and unpleasant are not fixed values. They are always measured against whatever you have already grown used to.

You know the feeling from your own eyes. Walk into a dark room and you see nothing. Wait a minute and the outlines of the furniture appear. No light has been added. Your measuring stick has moved.

Your mood does exactly the same thing. Their idea later acquired a name that stuck: the hedonic treadmill. You walk, you sweat, and you never arrive.

Trace it through your own life. In the first month in a new house you still walk down the hallway thinking you own something remarkable. Six months later it is the hallway. The salary that felt like relief five years ago is now the amount the bills come out of. Nothing has been taken away. The zero has moved.

It is tempting to read that cynically. Yet the scale explains why it is not a punishment. A scale that cannot tare is almost useless. It would keep reporting the bowl forever. What you want to know is what is newly added.

A mind that cannot tare would never notice anything new again. It would still be celebrating the job you got last year while something goes wrong today that needs your attention. Forgetting that you have something is the price of being able to notice what changes.

Dopamine does not measure happiness, it measures the difference

Which leaves the question of where that button actually sits.

In the 1990s the neuroscientist Wolfram Schultz measured the activity of individual dopamine cells in the brains of monkeys.² What he found is among the finest results in his field.

If a monkey unexpectedly receives a drop of juice, those cells fire a short burst. Once the monkey learns that a light announces the juice, the burst shifts to the light. And if the juice then arrives exactly as announced, nothing happens at all. If the juice fails to arrive, the activity drops below its resting line.

In plain language: dopamine does not measure how good something is. Dopamine measures the difference between what you expected and what you got. Researchers call this the reward prediction error. In a later review, Schultz describes the same pattern in humans, monkeys and rodents.³

Work it out the way you count your change.

You expected a ten-pound note and you get a ten-pound note. Difference: nothing.
You expected nothing and you get a ten-pound note. Difference: ten.
You expected a ten-pound note and you get five pounds. Difference: minus five.

The ten pounds is the same ten pounds every time. What changes is what you expected of it. There is your tare button, in cells. The moment your brain has learned to expect something, that same something weighs nothing.

Think of your first sip of coffee on a morning when you had not expected any coffee at all. Then think of this morning’s coffee, which was there because it is always there. The same cup. The same beans. One was a surprise and the other was a confirmation. Your mind rewards surprises and ignores confirmations. That is why progress almost always feels shorter than you hoped.

And a correction belongs here straight away, because this word is misused almost everywhere. Dopamine is not the happiness chemical.

The American psychologist Kent Berridge, working with his colleague Terry Robinson, showed that wanting and liking are two different systems in the brain.⁴ Wanting is generated by large, robust networks that include dopamine. Liking, the actual pleasure itself, comes from smaller and more fragile regions and does not depend on dopamine.

In a review in Neuron, Berridge and Morten Kringelbach go one step further. Some of the best-known textbook candidates for pleasure in the brain, including the mesolimbic dopamine system, may not generate pleasure at all.⁵

That is an uncomfortable result, and it explains a great deal. You can want something fiercely and barely enjoy it. You can look forward to an evening all week and notice, halfway through dinner, that you are already thinking about tomorrow. That is not a flaw in your character. They are two systems that do not share a button.

The word dopamine detox suggests you can empty a store of pleasure and top it up again. That is not how this research works. Dopamine is not a store of enjoyment. It is a difference signal.

Why uncertainty pulls harder than certainty

There is another layer, and it explains why your thumb keeps swiping.

In 1957 Charles Ferster and Burrhus Frederic Skinner described, in a very thick book, how animals respond to different reward schedules.⁶ Their best-known finding: behaviour that is rewarded only sometimes lasts far longer than behaviour that is rewarded every time. Unpredictable binds more strongly than reliable.

In 2003 Christopher Fiorillo, Philippe Tobler and Wolfram Schultz found the neural side of it.⁷ Alongside the short burst of the prediction error they saw a second, slower response. It rose gradually until the moment the reward might arrive. And it was strongest when the chance was around fifty per cent. Not at certainty. Not at hopelessness. At doubt.

Hold that up against a slot machine. Then hold it up against your feed. You never know what the next swipe will give you. A good clip, an unpleasant message, or nothing. It is precisely that fifty per cent that holds you. Not the content, but the uncertainty about it.

Look at an ordinary phone again with that thought in mind. A notification that brought you exactly the same thing every day at eight o’clock would be ignored within a week. A notification that sometimes holds something lovely and usually holds nothing is one you keep opening. A feed without an end is a feed without a moment at which your expectation is confirmed. And without confirmation, the question stays open.

Here it becomes more nuanced, and that belongs in the story. Fiorillo measured monkeys with a light and a drop of juice, not people with a phone. That screens lean on this same mechanism is a reasonable inference, not a measured fact.

But the direction is clear enough to say something else. If you keep scrolling at night while knowing perfectly well that you would sleep better, that is not weakness. Your thumb is doing exactly what an ancient learning machine does with an unpredictable reward. Recognising it is already something other than being able to stop it.

The lottery study everyone quotes is only half right

Now the study you have probably heard retold, usually at a party, usually with a sigh.

In 1978 Philip Brickman, Dan Coates and Ronnie Janoff-Bulman spoke to three groups of people.⁸ Twenty-two lottery winners. Twenty-two people from the same neighbourhoods who had won nothing. And twenty-nine people left paralysed by an accident.

The winners turned out to be no happier than the control group. In fact, they took measurably less pleasure in ordinary things. Breakfast. A conversation. A joke in the street.

That outcome has been quoted thousands of times as proof that money does not help. And it is a beautiful, comforting thought. Except that it involves twenty-two winners. One study, one moment of measurement, in the 1970s.

It is worth pausing on why this particular study travelled so far. It confirms something we would like to believe. That what we do not have would not have made us happier either. A small study that confirms a comforting thought gets quoted more often than a large study that contradicts it. That is not bad faith. It is how stories travel.

In 2020 Erik Lindqvist, Robert Östling and David Cesarini published something that stands on far firmer ground.⁹ They surveyed a large group of Swedish lottery players, five to twenty-two years after a major prize, following pre-registered procedures. Compared with carefully matched controls, winners of large prizes were durably more satisfied with their lives. That effect lasted more than a decade and showed no sign of fading.

And yet the old story holds a little too. The effects on happiness and on mental health were clearly smaller than the effects on life satisfaction.

That difference matters more than it seems. Being satisfied with your life is a judgement. Feeling good on a Tuesday afternoon is a feeling. The money mainly shifted the judgement. The treadmill runs harder under the feeling than under the judgement.

What your mind never resets to zero

Every metaphor stops working somewhere. This one does too, and it is more honest to say where myself.

Richard Lucas and his colleagues followed more than twenty-four thousand Germans for fifteen years.¹⁰ Those who became unemployed dropped sharply in life satisfaction and then climbed back up. But on average those people did not return fully to their old level, not even after they had found work again.

More striking still: people who had been unemployed before did not react more mildly the second time. Familiarity did not soften the blow. Precisely the opposite of what a tare button would do.

In 2006 Ed Diener, the same Richard Lucas and Christie Scollon revised the whole theory on five points.¹¹ People’s starting point is not neutral but slightly positive. People differ from one another in that starting point. There is probably not one starting point but several, for different components of well-being. Starting points can change. And people differ greatly in how quickly and how completely they adapt.

Set that beside the scale and you see three cracks.

A scale tares completely. A person does not. Some things your mind never resets to zero.

A scale tares instantly. A person needs months, sometimes years, sometimes in vain.

And a scale has one display. You have two. Wanting and liking run along different systems.⁴ The tare button sits mainly on the first. That is also why people who have everything can still be chasing, while people who have little can sometimes enjoy deeply.

The $75,000 that turned out not to be a ceiling

There is another reason to be careful with confident stories about happiness. The best-known number in this field has completely turned around in recent years.

In 2010 Daniel Kahneman and Angus Deaton analysed more than four hundred and fifty thousand responses from Americans.¹² Their conclusion: how you judge your life keeps rising with income, but day-to-day feeling stops improving at around seventy-five thousand dollars a year. That number travelled the world and still appears in countless articles.

In 2021 Matthew Killingsworth arrived with almost 1.7 million in-the-moment measurements from more than thirty-three thousand working Americans.¹³ He found no ceiling at all. Both forms of well-being simply kept rising.

Two opposing results, from serious researchers, in the same journal. And then something rather beautiful happened.

Kahneman and Killingsworth started working together, with Barbara Mellers joining them, in what they called an adversarial collaboration.¹⁴ They reanalysed the data and found the explanation. The ceiling does exist, but only among the least happy people. For everyone else happiness keeps rising with income, and in the happiest group it even accelerates.

I think this is the most honest piece of science in this whole article. Two researchers with opposing conclusions did not start shouting louder. They sat down and did the sums together. That is how it should go, and how it rarely goes.

The nuance stands. These are American data, in dollars, based on self-report. It is not a rule for your street. What it does show: money does not lift everyone in the same way, and someone who is unhappy does not become happy simply by having more of it.

You are also a poor forecaster of your own sorrow

So far the tare button sounds mostly like loss. There is a side to it you rarely hear about.

In 1998 Daniel Gilbert and his colleagues ran six studies on how people estimate their own future feelings.¹⁵ They asked people around the end of a relationship, around a refused academic post, around a lost election, after negative feedback and after rejection by an employer.

The same pattern every time. People thought they would feel bad for far longer than they actually did.

The researchers named the cause immune neglect. In plain language: you have a psychological immune system that processes setbacks, explains them, shrinks them and fits them into the story you tell about yourself. You just cannot see that system working. So you do not count on it when you imagine your future.

The same machinery that resets your joy to zero therefore resets your pain to zero as well. It is not cruel. It is impartial.

And a boundary belongs here. This is about everyday setbacks, not about grief, illness or lasting loss. Lucas and his colleagues showed precisely that some blows shift something permanently.¹⁰ Anyone carrying something heavy is not helped by the promise that it will return to zero on its own.

What the scale cannot do, and you can

Which leaves the question of what you do with all this. I have no step-by-step plan for you, and I distrust anyone who has one for something that has been in us this long.

There is, however, research showing which two things slow the erosion.

Kennon Sheldon and Sonja Lyubomirsky followed four hundred and eighty-one students for three months, across three rounds of measurement.¹⁶ They tested a model of how happiness drains away after a positive change. Two things held the effect for longer. Continued appreciation of the change itself. And continued variety in the experiences around it.

Translated back to the scale: appreciation is looking again at what is already on it. Variety is making sure it is not always exactly the same weight.

In an ordinary week that looks unspectacular. Appreciation is walking into your own kitchen once and actually seeing that you have it. Variety is speaking to the same friend at a different hour of the day, or reading a book in a chair you never sit in. It is not getting more. It is preventing what you already have from turning invisible through repetition.

The cracks belong here too. These were students, three months, using self-report. That is short and narrow for a statement about a whole life.

For gratitude the evidence is broader, and at the same time more modest than the self-help shelf promises. A pre-registered meta-analysis from 2025 pooled one hundred and forty-five publications, with nearly twenty-five thousand participants from twenty-eight countries.¹⁷ Gratitude exercises did raise well-being. The effect was small: a standardised measure of 0.19, with a confidence interval of 0.15 to 0.22.

In plain language: it works, it is not a fluke, and it is modest. It is a nudge, not a lever. The researchers also found differences between countries that they themselves could not explain. They say so plainly in the paper.

Almost two thousand years ago the Greek philosopher Epictetus wrote something that sits suspiciously well beside a kitchen scale.

Remember that you must behave in life as at a dinner party. Is anything brought around to you? Put out your hand and take your share with moderation. Does it pass by you? Don’t stop it.

Epictetus

From the classic English translation by Elizabeth Carter.¹⁸

He is not saying you may not want anything. He is saying you do not have to run after the dish.

Your brain is not broken. It is doing exactly what it was made to do: measure what is newly added, so that you keep looking. That mechanism carried your ancestors through winters. It brought you your education, your work, your moves to new places, your persistence on days when nobody was watching.

But a scale can only do one thing. Weigh what is added. You can do something it cannot. You can pick the bowl up and feel how heavy it is all over again.

What in your life has quietly become your new zero? And when did you last weigh it as though it had only just arrived?

This article provides general information and is not medical or psychological advice. If you have questions about your own health or wellbeing, please speak with your GP or a treating specialist.

Related reading

• Overstimulated: Why Rest Has Become Unbearable
• Why You Can’t Let Go: The Desire Path in Your Mind
• You Are What You Repeatedly Do

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Sources

The numbers in the text refer to this list.

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