The Lindy Effect: Why Old Things Refuse to Die

Cheesecake and the Secrets of Time

On Broadway and Fifty-first Street in Manhattan, there is a delicatessen called Lindy's. It has been there, in one form or another, since nineteen twenty-one. It is famous for its cheesecake, or at least it claims to be. Nassim Nicholas Taleb, the writer and statistician who would eventually make the place immortal in intellectual history, has described the cheesecake as much less distinguished than the deli's reputation. He has also predicted, with characteristic provocation, that by its own logic the deli will probably not survive.

But before it becomes a footnote in the history of New York dining, Lindy's has already given its name to one of the most useful ideas in the history of thinking about time: the Lindy Effect. And the story of how a deli full of gossiping comedians accidentally discovered a law of the universe is itself a story worth telling.

In the nineteen fifties and early nineteen sixties, Lindy's was a gathering spot for show business people, the place where comedians went after their performances to drink coffee, eat cheesecake, and conduct what one journalist called post-mortems on recent show business action. These were not gentle conversations. Comedians are professional observers of human failure, and they applied the same merciless eye to their peers that they applied to their audiences. Who was hot. Who was fading. Who had overexposed himself. Who was being smart about rationing his appearances.

Out of these late-night conversations emerged a pattern that everyone recognized but nobody had formalized. The comedians noticed that a television show that had been running for two weeks was likely to run for about two more weeks. But a show that had been running for two years was likely to run for another two years. The longer something had lasted, the longer it seemed likely to keep lasting. This was counterintuitive. Common sense says that the older something is, the closer it is to death. A eighty-year-old man has less life ahead of him than a twenty-year-old. But Broadway shows did not behave like men. They behaved like something else entirely.

Goldman's Fable

In June of nineteen sixty-four, a journalist and cultural critic named Albert Goldman published an article in The New Republic magazine that captured this deli folklore in print for the first time. Goldman called it Lindy's Law, and he framed it as a cautionary fable about the economics of exposure.

Goldman's original version was actually the inverse of what the Lindy Effect would later become. He argued that the life expectancy of a television comedian was inversely proportional to his total amount of exposure on the medium. In other words, the more you appeared on television, the faster you burned through your material, and the sooner you would be cancelled. The comedians who conserved their resources, who limited themselves to specials and guest appearances rather than committing to a weekly show, lasted longer. It was a theory of comedic sustainability, born from the bitchy wisdom of professionals who had watched dozens of careers flare and burn out.

Goldman's article was a minor curiosity. It circulated in media circles, was quoted occasionally, and then mostly forgotten. What saved it from obscurity was a mathematician.

In nineteen eighty-two, Benoit Mandelbrot, the father of fractal geometry and one of the most unconventional mathematicians of the twentieth century, picked up Goldman's idea and turned it inside out. Mandelbrot was interested in what he called heavy-tailed distributions, probability distributions where extreme events are far more common than a normal bell curve would predict. He recognized that the survival times of Broadway shows, and of many other non-biological phenomena, followed exactly this kind of distribution.

Mandelbrot reformulated Lindy's Law as follows: for certain types of things, the future life expectancy is proportional to the past. A Broadway show that has run for a hundred days can be expected to run for roughly a hundred more. If it survives to two hundred days, it can expect another two hundred. Each day of survival does not bring the show closer to death. It pushes death further away. The show ages in reverse.

This was not a law about comedians. It was a law about non-perishable things. And in the hands of Nassim Nicholas Taleb, who encountered the idea decades later, it would become one of the most powerful heuristics for navigating an uncertain world.

Things That Age Backwards

Taleb first wrote about the Lindy Effect in his twenty twelve book Antifragile: Things That Gain from Disorder, and he has been refining and extending the idea ever since. His formulation is cleaner and more radical than either Goldman's or Mandelbrot's.

The Lindy Effect, as Taleb defines it, applies to non-perishable things: ideas, technologies, books, institutions, cultural practices, recipes, tools. Anything that does not have a biological expiration date. For these things, every additional year of survival implies a longer remaining life expectancy. A book that has been in print for forty years can be expected to remain in print for another forty. But if it survives another decade, making it fifty years old, its expected remaining life jumps to fifty more years. It is not aging. It is anti-aging. Time is not wearing it down. Time is proving it.

This, simply, as a rule, tells you why things that have been around for a long time are not aging like persons, but aging in reverse. Every year that passes without extinction doubles the additional life expectancy.

The key distinction is between the perishable and the non-perishable. A human being is perishable. No matter how healthy a ninety-year-old is, her life expectancy is short, because biological systems wear out. A cat is perishable. A tomato is perishable. A mechanical part is perishable. All of these things have a built-in expiration, a maximum lifespan imposed by physics and biology.

But the Iliad is not perishable. It has been read continuously for roughly twenty-eight hundred years. By the Lindy Effect, it should be expected to survive for roughly twenty-eight hundred more. War and Peace is about a hundred and sixty years old. Expect it to last another hundred and sixty. The Bible has been around for roughly two thousand years in its current form. The Lindy Effect would predict another two thousand. The multiplication table has been around for about four thousand years. Good luck killing it.

The same logic applies to technologies. The wheel has been in use for roughly five thousand years. Expect it to continue. The chair has been around for about five thousand years. The fork, roughly a thousand. The book, about five hundred and fifty in its printed form, much longer in manuscript. Each of these technologies has survived the arrival of countless competitors, alternatives, and would-be replacements. Their longevity is not a coincidence. It is evidence of a deep fitness, a compatibility with human needs that has been tested by the harshest judge available: time.

The Only Honest Judge

This is the philosophical core of the Lindy Effect, and it is the part that makes some people uncomfortable. Taleb argues that time is the only reliable judge of quality. Not critics. Not experts. Not awards committees. Not peer review boards. Not the market, at least not in the short term. Time. Because time exposes things to the full range of possible disruptions, shocks, changes in taste, technological revolutions, cultural upheavals, and the general entropy of the universe, and the things that survive all of that are, by definition, the things that have proven their robustness.

A book that a prestigious critic praised in nineteen ninety-five but that nobody reads today has failed the Lindy test. A book that no critic praised in seventeen ninety-five but that people still read today has passed it. The opinions of experts are fragile. The verdict of time is not.

Taleb takes this further. He argues that the Lindy Effect is connected to his broader theory of fragility and antifragility. Fragile things break under stress. Robust things resist stress. Antifragile things actually get stronger under stress. The things that survive the Lindy test are at minimum robust, and in many cases antifragile, because each year of survival, each new challenge they endure, makes their continued survival more likely.

Use laws that are old but food that is fresh.

That quote is attributed to Periander, a ruler of Corinth who lived in the sixth century before Christ. It is itself a Lindy-proof statement. The advice has been around for roughly twenty-six hundred years. By the Lindy Effect, it should survive for another twenty-six hundred. And its content is a perfect expression of the Lindy principle: trust old laws, because they have been tested, but eat fresh food, because food is perishable and subject to decay. Periander understood the distinction between the perishable and the non-perishable more than two millennia before Mandelbrot formalized it.

The Practical Consequences

What does the Lindy Effect actually tell you to do? Taleb, characteristically, uses it as a guide for almost everything.

When choosing what to read, prefer old books to new ones. A book that has been in print for a century is almost certainly more valuable than a book published last month, because the old book has survived the filter of time while the new book has not yet been tested. This does not mean new books are worthless. It means the base rate for new books surviving is very low. Most of them will be forgotten within five years. The few that survive will have earned their place.

When choosing technologies, prefer proven ones to novel ones. A database system that has been in production for twenty years is, all else being equal, a safer bet than one released last year. This does not mean you should never adopt new technology. It means you should be honest about the risk. The new system might be brilliant. It might also disappear. The old system has already demonstrated that it can endure.

When choosing how to eat, prefer traditional diets to trendy ones. Olive oil, bread, wine, legumes, fermented foods. These have been part of human diets for thousands of years. The latest superfood supplement has been around for eighteen months. Which one do you trust with your body? Taleb, who is himself of Lebanese origin, advocates what he calls a Mediterranean bias: eat what your ancestors ate, because their diet has been tested across hundreds of generations.

When evaluating ideas, be deeply skeptical of anything that claims to be new and revolutionary. Most revolutionary ideas fail. The ones that survive stop being revolutionary and become traditional. If an idea has been around for five hundred years and still generates insight, it is likely to generate insight for another five hundred. If an idea was published in a journal last week and everyone is excited about it, wait. Time will judge.

When building institutions, study old ones. Universities have existed for nearly a thousand years. Monasteries for fifteen hundred. Tavernas for twenty-five hundred. The startup founded eighteen months ago with a novel organizational structure is interesting but unproven. The institution that has survived centuries has demonstrated something that no business plan can demonstrate: the ability to endure the full range of human chaos.

The Traps

The Lindy Effect is powerful, but it is not magic, and it comes with at least three serious traps for the unwary.

The first trap is survivorship bias. When you look at old things that still exist, you are looking only at the winners. For every book that has been in print for a century, there are thousands of books from the same era that vanished without a trace. The Lindy Effect does not say that old things are good because they are old. It says that things which have survived a long time have demonstrated a specific kind of fitness. The distinction matters. There were plenty of terrible ideas in ancient Greece. They did not survive. The fact that we only see the survivors can make the past look wiser than it actually was.

The second trap is the assumption of stationarity. The Lindy Effect relies on the conditions that tested the surviving thing remaining roughly similar to the conditions it will face in the future. If the world changes dramatically, all bets are off. The horse-drawn carriage survived for centuries. Then the internal combustion engine arrived, and the carriage was gone within a generation. The Lindy Effect would have predicted continued survival, but a regime change, a fundamental shift in the underlying technology, broke the pattern. In domains where rapid, discontinuous change is common, like consumer technology or social media, the Lindy Effect is a weak guide at best.

The third trap is the temptation to turn the Lindy Effect into a lifestyle brand. In recent years, a community of online enthusiasts, sometimes called Lindy Twitter, has emerged around the idea of living a Lindy life: eating traditional foods, reading ancient philosophers, distrusting modern innovations, and cultivating a kind of nostalgic Mediterranean aesthetic. Some of this is thoughtful. Some of it is cosplay. The Lindy Effect is a statistical heuristic, a tool for thinking about probability under uncertainty. It is not a religion. It does not tell you that the past was better than the present. It tells you that things which have survived a long time are likely to survive longer. That is a useful piece of information. It is not a philosophy of life.

Time Is Talking

Here is the thing that stays with me about the Lindy Effect. It is not, at its core, a theory about things. It is a theory about time. It says that time is not neutral. Time is a filter. It is the most brutal, most impartial, most comprehensive testing mechanism that exists. Every day, every year, every century, the things that exist are being subjected to an ongoing examination. The economy shifts. Tastes change. Technologies emerge. Wars happen. Pandemics sweep through. And the things that are still standing after the storm has passed are the things that have something in them, some quality of robustness, some deep compatibility with human needs, that allows them to endure.

You cannot fake this. You cannot buy your way through the Lindy test. You cannot network your way past it. You cannot hype a product or an idea into long-term survival. You can hype it into short-term visibility, but visibility and survival are different things. The hot book of the season, the trending app, the viral idea: these are phenomena of attention, not of durability. They may turn out to be durable. Most will not. And the only way to know is to wait.

Taleb tells a story about walking to dinner at a restaurant. The taverna has existed for twenty-five centuries. He is wearing shoes that are hardly different from those worn fifty-three hundred years ago by the mummified man found in a glacier in the Austrian Alps. At the restaurant, he uses silverware, a Mesopotamian technology. He drinks wine from grapes, a practice roughly eight thousand years old. He walks home on streets, a technology roughly five thousand years old. Everything in his evening is ancient. The newest thing about his dinner is the restaurant's menu, printed last month.

The world feels new because we are surrounded by new things: new phones, new apps, new headlines, new crises. But the infrastructure of daily life, the deep substrate on which all the novelty rests, is staggeringly old. Chairs, tables, doors, windows, bread, olive oil, conversation, laughter, the walk home under the stars. These things have been tested by time beyond any testing that any laboratory or market or critic could impose. They have survived because they work. And by the Lindy Effect, they will continue working long after the phone in your pocket has been forgotten.

A group of comedians in a New York deli noticed something about Broadway shows. A mathematician recognized the same pattern in fractal geometry. A Lebanese-American statistician turned it into a heuristic for navigating uncertainty. And behind all of them, silent and patient and absolutely indifferent to human opinion, stands the only expert whose judgment has never been wrong: time.

The cheesecake at Lindy's may or may not be good. The idea that was born there is twenty-six hundred years older than the deli, because Periander said the same thing in the sixth century before Christ, and people on the streets of Corinth probably said it long before him. The Lindy Effect is itself Lindy-proof. It has survived because it is true. And it will go on being true long after all of us, and all our clever new ideas, have been forgotten.

The old things know something. Listen to them.