Zero-Sum vs Positive-Sum Games
John von Neumann / Oskar Morgenstern · 1944
"Von Neumann distinguished zero-sum games — where one player's gain is exactly another's loss — from positive-sum games where mutually beneficial moves exist, arguing that misclassifying a positive-sum situation as zero-sum is one of the costliest strategic errors."
In 1944 von Neumann and Morgenstern formalized games where the chips on the table never change: poker hands, fixed-budget negotiations, and wars for territory are zero-sum; trade, innovation, and trust-building are not.
Zero-sum payoffs sum to zero by definition, so strategy is pure competition; positive-sum payoffs allow both sides to grow the pie and then argue over the split. The error is framing a positive-sum interaction — a hire, a partnership, a product ecosystem — as zero-sum, which drives both sides to defect where they could have cooperated. Much of negotiation and product strategy is first correctly classifying which game you are actually in.
Why does misclassifying a positive-sum game as zero-sum damage outcomes?
Read more about the topic
The explanation above is written with AI assistance. These are the originals — go to them to check it.
- Theory of Games and Economic Behavior (1944)von Neumann & Morgenstern / Wikipedia
Repeated Games & Axelrod's Tournaments
"Axelrod invited game theorists to submit programs for iterated prisoner's dilemma and the simplest — Tit for Tat, cooperate first then copy the opponent — won, showing cooperation can evolve without central authority when the shadow of the future is long enough."