Antifragile · Nassim Nicholas Taleb

The Lindy effect: the longer something has lasted, the longer it will last

Curated by · reviewed 2026-06-01

For things that don't age — ideas, books, technologies — the longer they've already survived, the longer they're likely to last. Time is a brutal, honest filter, so what's old has already passed the test new things haven't.

The Lindy effect: for non-perishable things like ideas, books, and technologies, every extra year they've survived predicts roughly another year of life. What's lasted is likely to keep lasting.

A person's life expectancy drops as they age — every year lived is one closer to the end. But a strange thing happens with ideas, books, and technologies: they work the opposite way. A book in print for 50 years will probably be read in another 50; a book published this year may be forgotten by Christmas. Nassim Taleb named this the Lindy effect: for things that don't physically age, survival predicts more survival.

Why? Time is a ruthless filter. A technology, a habit, or a piece of wisdom that's been around for centuries has been stress-tested against countless conditions, fashions, and critics — and it's still here. The new and trendy hasn't faced that test yet, so most of it will quietly vanish. The Stoics are still read 2,000 years later; this decade's bestselling self-help mostly won't be.

Practically, Lindy is a bias toward the old when you're uncertain. Choosing what to read, which tools to learn, which advice to trust — default to what has already proven durable. It's not that new things can't be great; it's that they're unproven, and the proven ones come with 2,000 years of free quality-testing. When in doubt, bet on what time has already kept.

Why it matters

In a world flooded with new and trendy, Lindy is a simple filter for what's worth your limited attention — the durable old thing is usually the safer bet than the shiny new one.

A common misreading

Lindy isn't 'old is always better, never adopt anything new.' Plenty of old things are bad and plenty of new things are great. It's a probabilistic default for uncertainty: when you can't tell quality directly, longevity is decent evidence — but real evidence of quality beats Lindy every time.

Put it to work

Test yourself

According to the Lindy effect, what does an idea's age tell you about its future?
Show answer
For non-perishable things, the longer something has already survived, the longer it's likely to last — age is evidence it has passed time's filter, not evidence it's near the end.

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Related ideas

Some things gain from disorder — that's antifragileAntifragile→ Chesterton's fence: understand why it's there before you remove itThe Thing→ Wealth is what you don't seeThe Psychology of Money→

FAQ

What is the Lindy effect?
The idea that for non-perishable things — books, ideas, technologies — life expectancy increases with age. Every extra year of survival predicts roughly another year, because lasting this long is evidence of durability.
Does the Lindy effect apply to people?
No — it applies only to non-perishable things like ideas and technology. Living things age and have a falling life expectancy; ideas and tools don't age the same way, so survival makes them a safer bet.