The future is uncertain, but we still have to make decisions about it. Which books are worth reading? Which institutions are likely to survive? Which foods, tools, ideas, or systems have already stood the test of time?
Most of us care most about predictions that may affect our own lifetime. We care more about the next 10 or 20 years of the stock market than the next 200 years of civilization. That bias is understandable, but it still leaves us with hard questions:
- Is the stock market safe to invest in?
- Could a company like Apple, Microsoft, or Google eventually disappear?
- Which book should you prioritize?
- Which foods should you eat or avoid?
- Will democracy continue to exist?
The Lindy Effect is one simple heuristic that can help us reason about questions like these.
What Is the Lindy Effect?
The Lindy Effect says that, for some non-perishable things, future life expectancy is proportional to current age. In plain language: in many domains, the old wins over the new.
The key phrase is non-perishable things. The Lindy Effect applies best to ideas, books, institutions, practices, technologies, and cultural artifacts that can survive through time. It does not apply cleanly to living organisms or anything governed by a biological clock.
For example, the iPhone launched in 2007, which means it is 19 years old in 2026. Given how fast technology moves, how many more years will the iPhone be in production before it becomes obsolete? A simple Lindy estimate would suggest at least another 19 years. That does not make the outcome certain, but it gives us a useful baseline.
Nassim Nicholas Taleb has called Lindy one of the most useful heuristics he knows:
"Lindy effect is one of the most useful, robust, and universal heuristics I know." - Nassim Nicholas Taleb
The quote matters because it frames Lindy correctly: useful, robust, and broad, but still a heuristic rather than a law.
Answering Lifespan Questions Using Lindy
Let us apply the Lindy Effect to the questions above.
Is the stock market safe to invest in?
The New York Stock Exchange was founded in 1792. Its survival across wars, recessions, depressions, technological shifts, and political change is meaningful evidence. Lindy does not prove that public markets will last forever, but it suggests that large, old financial institutions are harder to dislodge than fragile new systems.
The practical lesson is not "the stock market can never fail." It is that long-surviving institutions deserve a different baseline than new experiments.
Can a company like Apple, Microsoft, or Google go bankrupt?
Any company can fail. Lindy does not make businesses immortal.
But age can still tell us something. A company that has survived multiple technology cycles, leadership changes, recessions, and competitive threats has shown more resilience than a company that has only existed in one favorable environment.
The better question is not, "Can this company go bankrupt?" The better question is, "What has this company already survived, and what kind of disruption could still break it?"
Which book should you prioritize?
Adam Smith's The Wealth of Nations was published in 1776 and remains foundational to economics. Its age does not make it automatically correct in every detail, but its survival tells us it has influenced many generations of thinking.
By contrast, thousands of new economics and business books are published every year. Some will matter. Most will fade. Lindy suggests starting with books that have already survived before chasing every new bestseller.
Which foods should you eat or avoid?
Wine is 8,000 years old while coffee is at least 1,000 years old. Some of the oldest crops going back at least 10,000 years include wheat, barley, lentils, chickpeas, rice, millet, corn, and peas.
Many of the newer food items, on the other hand, go back no more than a few hundred years. For example, white sugar was chemically created 200 years ago. High Fructose Corn Syrup (HFCS) was developed in the 1960s, Aspartame in 1965, MSG in 1908, and Trans Fats in the 1950s.
Once again, the Lindy Effect helps us apply the filter of time and tells us that we can't go wrong in eating the same foods or drinking the same liquids that our ancestors had.
Taleb captures this instinct with his unique style:
"Read nothing from the past one hundred years; eat no fruits from the past one thousand years; drink nothing from the past four thousand years (just wine and water)." - Nassim Nicholas Taleb
The point is not to follow this literally. It is to notice that time can be a useful filter when deciding what to trust.
Will democracy continue to exist?
This question should now be easy. The United States of America is one of the world's oldest continuous democracies. In 2026, America marks 250 years of independence. This means, per the Lindy Effect, we can expect democracy to exist for at least another 250 years.
That does not mean political systems are automatic. They survive through norms, institutions, participation, and restraint. Lindy should make us respect democracy's durability, not take it for granted.
"Burn old logs. Drink old wine. Read old books. Keep old friends." - El Sabio
That line captures the emotional appeal of Lindy: old things are not valuable only because they are old. They are valuable when age is evidence of survival, usefulness, and accumulated trust.
When Not to Apply the Lindy Effect
The Lindy Effect is a heuristic, not a law. A heuristic is a rule of thumb: a mental shortcut that can help with faster judgment under uncertainty. It will not work everywhere.
Perishable Things
Living things are perishable because they are bound by biological clocks. With each passing day, a living organism is closer to death. If a person is 50 years old, you cannot use Lindy to predict that they will live to 100.
The Lindy Effect applies best to non-perishable things that can gain evidence of durability through time.
Disruptions
From 2001 to 2007, Nokia was the leading smartphone maker. A naive Lindy reading in 2007 might have suggested continued dominance. But the iPhone disrupted the smartphone industry, and Nokia eventually exited the smartphone business.
Even for non-perishable things, disruptions and black swan events can alter the status quo.
Timescale
The shorter the timescale, the less useful Lindy becomes. Hidden details are often revealed only with time.
For example, during the "honeymoon phase" of a relationship, everything may seem easy. Only time reveals whether the relationship can survive stress, conflict, and change.
Probability
Lindy estimates life expectancy, not guaranteed lifespan. Life expectancy is probabilistic. Lifespan sounds fixed.
When we use Lindy, we are making an estimate with uncertainty, not an assertion with absolute confidence. Even within the same domain, such as technology, the Lindy Effect cannot be applied equally to every product, company, or idea.
There are many situations where Lindy will not work. As with all heuristics, the best advice is to use your judgment.
If you want to learn more about the Lindy Effect, Nassim Taleb's Incerto series is a good place to start.
"Not everything that happens happens for a reason, but everything that survives survives for a reason." - Nassim Nicholas Taleb
The question worth carrying forward is: where can you apply the Lindy Effect in your own life? You might use it to choose which books to read first, which foods to trust, which institutions to respect, which tools to rely on, or which traditions are worth preserving.