The Lindy Effect
The Lindy Effect states that for non-perishable things — ideas, technologies, institutions, books, businesses, artistic techniques — the longer something has survived, the longer it is expected to continue surviving. Life expectancy grows with age for non-perishables (the opposite of biological organisms, which age and die).
Named after Lindy’s delicatessen in New York, where the informal observation originated among comedians: a Broadway show that had run for 100 days was expected to run another 100 days; one that had run 200 days was expected to run another 200.
Primary source: taleb-2018-skin-in-the-game
The Logic
For perishable things (organisms, physical objects), survival probability decreases with age — after enough time, everything breaks down. For non-perishable things, survival itself is evidence of fitness.
A technology surviving 1000 years has been tested by every civilization and generation in those 1000 years, each of which had the opportunity to abandon it. Its survival means it provided sufficient value under sufficient variety of conditions. A technology invented last year has been tested by almost no conditions.
Formally: if something has survived T years, expect it to survive ~T more years.
Applications
| Domain | Lindy Application |
|---|---|
| Books | A book read for 200 years will likely be read for another 200; a bestseller from last month probably won’t survive 5 years |
| Technologies | Writing (5000+ years) is a more reliable technology than any digital format. Linux (30 years) more likely to persist than any web framework (3 years) |
| Medical treatments | Ancient herbal remedies that have survived millennia may encode safety information that recent drugs have not yet earned |
| Institutions | The Catholic Church (2000 years) is more structurally robust than any 20th-century political party |
| Business heuristics | ”Keep the customer satisfied” has survived longer than any management framework |
| Languages | Latin had greater Lindy than any contemporary language; English is now accumulating Lindy |
Taleb’s Use: Against Neomania
Taleb uses Lindy as a corrective to neomania — the irrational preference for the new over the old merely because it is new. Modern institutions, media, and markets systematically over-weight recent innovations and under-weight time-tested knowledge.
Lindy implies:
- Prefer the classical library to the new bestseller for non-perishable knowledge
- Distrust recent innovations in high-stakes domains until they have earned Lindy
- Respect evolved social norms and traditions as implicit risk management (they survived; naive “improvements” may destroy the embedded wisdom)
Limits
The Lindy Effect applies only to non-perishables. It does not apply to:
- Biological organisms (a 90-year-old human is less likely to reach 100, not more)
- Physical objects under wear and tear
- Non-recurring phenomena (a specific political coalition may persist or collapse independent of its age)
It also does not mean old things are better — only that they are more likely to persist. The Lindy effect is a heuristic, not a law.
Relationship to skin-in-the-game
Things with long Lindy have survived because they were repeatedly tested by reality — they had implicit skin in the game across generations. Ancient wisdom traditions survived because the communities that practised them survived; knowledge embedded in those traditions carried the cost of being wrong.
Related Concepts
- skin-in-the-game — the mechanism that generates Lindy (reality testing)
- antifragility — related concept: antifragile systems gain strength from repeated exposure
- heuristics — Lindy is a meta-heuristic for selecting which heuristics to trust