Nell WatsonThe Trust Game
Five strangers, a dozen exchanges each. Every round, you both choose: open palm or fist. Nobody sees the other's hand until both are shown.
| they open ♡ | they fist × | |
|---|---|---|
| you open ♡ | 3 · 3trade | 0 · 5betrayed |
| you fist × | 5 · 0you take all | 1 · 1wasted round |
After The Dance of the Open Palm and Robert Axelrod's tournaments. Whoever you play, the real opponent is the temptation on the table.
Your ledger
Now watch the theorem
The five strategies above can play each other perfectly well without us. Below, every strategy meets every strategy — including itself — for hundreds of rounds. Drag the slider to add trembling hands: a chance that any chosen move misfires. Noise is where strictness dies and forgiveness earns its keep.
The tournament — average points per round, all meetings
Generations — a population evolving, the successful multiplying
As a table
In Axelrod's tournaments the winning strategies were never the sharks. They were nice (never the first to show a fist), forgiving (quick to return to the open palm), provokable (no pushovers), and clear. Watch the generations run: coercion blooms early by eating the trusting, then starves when there is no one left to betray — and the more the hands tremble, the more the future belongs to the forgiving. Coercion wins rounds; invitation wins decades. This is the Trust Attractor, and you have just watched its pull.
The argument in full: Why Partnership Beats Control · Bilateral Alignment Strategy