Metcalfe's Law
Origin
Drawn in 1980 by Ethernet inventor Robert Metcalfe in 3Com sales materials. One phone is useless; two phones make 1 connection, three make 3, n make n(n-1)/2 ≈ n². Network cost grows linearly, but value grows quadratically. The fundamental equation of the internet, SNS, and platform business.
Meaning
Why KakaoTalk dominates Korea — a network with every Korean has a value no challenger can match. Metcalfe's Law is the mathematical foundation of winner-takes-all markets. But the brutality of breaking network effects (Skype → Zoom) follows the same equation.
Lesson — Meeting Eastern Classics
Analects 1.1: "Is it not joyful when friends come from afar?" Confucius taught friendship as multiplied joy. Metcalfe showed this joy is mathematically n².
"網" combines thread (糸) with the older "net" character (罔) — originally a fishing net. Confucius taught comprehensiveness (周). Every knot in the net creates value — and missing a knot creates more than proportional emptiness.
