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An Italian economist once noticed that a small handful of pea pods in his garden produced most of the peas — and that the same lopsided pattern shows up almost everywhere.

What does the "Pareto principle" roughly state?

About 80% of results come from 20% of causes
Also called the 80/20 rule, the Pareto principle observes that a small share of causes often drives most of the results — 20% of customers bringing 80% of sales, and so on.

The Pareto principle holds because many real-world systems are shaped by a few dominant contributors rather than evenly spread effort. Vilfredo Pareto noticed this imbalance in land ownership in Italy, where a small fraction of people held most of the property, and the same skewed pattern later turned up in sales, wealth, and software bugs, becoming a general rule of thumb rather than a strict law.

"The majority always rules" describes democratic voting, not concentrated causes, and the claim about eight-hour focus is an unrelated idea about attention spans with no connection to Pareto's observation.

Because the ratio is only a rough approximation, real data often shows splits like 70/30 or 90/10 — the number is shorthand for "badly imbalanced," not a precise formula.

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