The Lindy effect

Probability & time

The Lindy effect says that for non-perishable things — ideas, books, technologies — life expectancy grows with age. The longer something has already survived, the longer it’s likely to last. A book in print 50 years will probably outlast one published this year.

Widely referenced — cross-referenced 13× across this reference (7 related ideas · 5 comparisons · 1 book) · The State of Thinking 2026 →

By the ReadGlobe Editors · Reviewed 2026-05-29

How it works

For things that don’t age biologically, survival is evidence of robustness. Each extra year a non-perishable thing endures raises the expectation of its remaining life, because it has passed more tests of time.


For ideas and books, age is unglamorous but honest evidence — what has lasted will likely last longer.

How to use it


  • Favour time-tested ideas, tools, and texts over the merely new when betting on durability.
  • Discount hype around the brand-new — most novelties don’t last.
  • Read old books and use proven technologies for problems where longevity matters.

Worked example

Euclid’s geometry has been used for ~2,300 years and will likely be taught for centuries more; this year’s trendy framework will probably be forgotten within a decade. Age predicts survival for non-perishables.

Where it fails

It applies only to non-perishable things — for people, machines, and biological systems, age means closer to the end, not further from it. And it’s probabilistic: some old things die, some new things endure.

  • Longevity can reflect lock-in, subsidy, or lack of alternatives rather than merit — QWERTY-style survivors persist for reasons other than quality.
  • It is silent on discontinuities: a technology can obey Lindy for a century and be obsoleted in a decade once a substitute crosses a threshold.
  • Used as a filter for ideas, it structurally excludes everything new — a portfolio chosen purely by Lindy would never have adopted antibiotics, flight, or the internet early.

The counter-model: Creative destructionLindy bets on the old surviving because it is old; creative destruction expects entrenched incumbents to be periodically demolished by innovation — the tension is exactly when to trust age and when to bet against it.

How to apply it, step by step


  1. Facing a choice between an established option and a new one, first confirm the thing is non-perishable — an idea, method, or format, not a machine or organism.
  2. Note how long the established option has already survived under real use.
  3. Ask whether its survival reflects continued merit or mere lock-in.
  4. Check for an active substitute approaching a tipping point.
  5. Default to the survivor unless the substitution evidence is concrete, not fashionable.

The deeper point

Lindy is a filter against your own novelty bias. The new feels important because it’s loud, not because it’s likely to last — and most of what’s loud today is invisible in a decade. Age is unglamorous but honest evidence.

Frequently asked


What is the Lindy effect?
The idea that for non-perishable things like books and ideas, the longer they’ve already survived, the longer they’re likely to keep surviving.
Does the Lindy effect apply to people?
No — only to non-perishable things. For humans and machines, more age means less expected life remaining, the opposite of Lindy.
How do you use the Lindy effect?
When durability matters, favour time-tested ideas, tools, and texts over the merely new, and discount hype around unproven novelties.

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ReadGlobe. (2026). The Lindy effect. https://readglobe.com/model/lindy-effect/

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"The Lindy effect." ReadGlobe, 29 May 2026, readglobe.com/model/lindy-effect/.

Primary source: Wikipedia

Editorial synthesis © ReadGlobe 2026, drawing on the mental-models tradition (Charlie Munger, Farnam Street) and the primary sources for each model. · Last reviewed 2026-05-29.