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Economists often talk about the 80/20 Principle, which is the idea that in any situation roughly 80 percent of the “work” will be done by 20 percent of the participants. In most societies, 20 percent of criminals commit 80 percent of crimes. Twenty percent of motorists cause 80 percent of all accidents. Twenty percent of beer drinkers drink 80 percent of all beer. When it comes to epidemics, though, this disproportionality becomes even more extreme: a tiny percentage of people do the majority of the work.

Economists often talk about the 80/20 Principle, which is the idea that in any situation roughly 80 percent of the “work” will be done by 20 percent of the participants. In most societies, 20 percent of criminals commit 80 percent of crimes. Twenty percent of motorists cause 80 percent of all accidents. Twenty percent of beer drinkers drink 80 percent of all beer. When it comes to epidemics, though, this disproportionality becomes even more extreme: a tiny percentage of people do the majority of the work.

Approximate author period: c. 1963 AD · modern

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Attribution & collection notes
Author or tradition
Malcolm Gladwell
Attribution: attributed
Country attributed
Not established
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Historical period
Approximate author period: c. 1963 AD · modern
Approximate author-period anchor from documented birth year 1963; activity date not established; Wikidata Q318429, https://www.wikidata.org/wiki/Q318429 (accessed 2026-10-08). Not a quotation composition date.
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Recorded source
Contributor-provided quotation collection

Supplied reference C; CSV row 75241; supplied attribution, independently unverified

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