Radiolab

Tit for Tat

Sep 17, 2019
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INSIGHT

Crisis Sparked The Question Of Cooperation

  • The Cuban Missile Crisis inspired Axelrod to study repeated interactions using the prisoner's dilemma.
  • He sought conditions that let cooperation emerge between rivals who fear being exploited.
ANECDOTE

The Mail-In Prisoner’s Dilemma Tournament

  • Axelrod ran a mail-in computer tournament where submitted programs played each other repeatedly.
  • Each program played every other program 200 times and the total scores determined the winner.
INSIGHT

Simplicity Outperformed Complexity

  • A two-line program called Tit for Tat beat complex entries in Axelrod's tournament.
  • Its rules: start by cooperating, then mirror the opponent's previous move.
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