Lindy effect

mental-model

For durable, non-perishable ideas and practices, survival is evidence: the longer they have endured attacks, imitation, and changing contexts, the more remaining life you should provisionally expect.

Sacredness looks fragile because it attracts attack. The Lindy effect suggests the reverse: what remains sacred after repeated challenges may persist precisely because those challenges have already failed to dislodge it.

Time as a stress test

A non-perishable idea does not wear out like food or machinery. Each additional period of survival instead exposes it to more rivals, hostile scrutiny, copying, reinterpretation, and social change. Ideas that cannot travel or adapt disappear; those still present have passed a growing sequence of filters. That makes age more than a date: it is accumulated evidence of resilience. In rough terms, an idea's expected future life rises with the life it has already demonstrated.

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Where it shows up

Hinduism by evolution

FutureIQ describes Hinduism as “Lindy by evolution”: across a long history in which religions and ideas have been smashed or displaced, its surviving elements have persisted through selection. The claim is not that every element is correct, but that continued survival demands explanation.

The sacred under attack

Practices considered sacred today have often faced repeated attempts at rejection or replacement. Their endurance is therefore evidence that they may remain sacred longer than a newly fashionable practice with no comparable test behind it.

Copy what has kept working

The Lindy rule changes how you choose influences: an old idea worth copying carries a survival record, while novelty offers mainly a compelling first impression. Past endurance becomes a rough prior for future endurance.

Survival is not truth

Age can tell you that an idea is unusually good at persisting; it cannot tell you why, or prove that the idea is true, beneficial, or suited to your circumstances. Power, sacred protection, and inherited habit may also preserve beliefs. Lindy is a prior for durability, not a verdict on merit.

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Make age earn a place in the comparison

When choosing between two practices that promise the same benefit, write down how long each has operated across changing contexts and what attacks or replacements it has survived. Give demonstrated endurance real weight—then separately test whether the old practice's mechanism and trade-offs fit your situation.

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Episodes that teach this

Pav Bhaji is Not INDIAN? Surprising Origin & History of Indian Food - FutureIQ · explained at 11:55 59,160 views
'Hinduism is Lindy by evolution' — it has lasted while other religions get 'smashed' because the best ideas stay on.
Exploring The Idea Of "Sacredness" - Future IQ · explained at 12:18 6,448 views
“It is likely to be lindy… things which are sacred today have survived a lot of attacks… they’re going to remain sacred for a long time.”
It's Ok to Copy Others - Steal Like an Artist · explained at 12:49 1,193 views
How long an idea will survive in the future is roughly proportional to how long it has survived so far.