Diplomacy as a Game Theory Laboratory

Uses the board game Diplomacy as a vivid game-theory laboratory across seven 'studies': the Prisoner's Dilemma (the France/Germany backstab temptation), Parfit's Hitchhiker (the Key Lepanto opening fails because Italy can't credibly promise to give the territory back), enforceable side-contracts (a mob-boss contract; Scott won a game via a binding oath imported from a separate medieval RPG), religion as enforcement (swearing a religious player to God; equally Alicorn's deontology or Eliezer's oath-keeping consequentialism), excuses as rule-deviations (the Yemen gambit using an India threat as cover to grab a center without collapsing the alliance), revenge as a cultivated reputation (throwing the game to punish a betrayer — anger as commitment device), and the standout: in-group bias derived from pure Schelling-point logic via the lifeboat-cannibalism thought experiment (the lone brunette becomes the focal victim), applied to a real SIAI-Fellows alliance. Borrowed concepts, but the brunette/Schelling derivation of in-group bias is a clean, memorable original insight (later echoed in his Lifeboat Games writing).

Quality 74 · Strong. Strong applied game theory — substantial, concrete, and entertaining, with the Schelling-point derivation of in-group bias as a genuine standout. Low-Strong because it is anecdotal and the underlying concepts (PD, Parfit, Schelling) are all borrowed; it is a 'lab' applying known theory.

Claude’s paradigm shift 46 · Moderate. Notable in spots — the concepts are standard, but the brunette/lifeboat derivation of in-group bias and the religion-as-enforcement-in-practice observations are fresh angles.

Real-world impact 2 · Minor. Substantial, concrete applied game theory using the board game Diplomacy as a 'laboratory' (Prisoner's Dilemma, Parfit's Hitchhiker, enforceable contracts), with the Schelling-point derivation of in-group bias a standout — but a lab applying borrowed concepts. Conceptual/illustrative influence within rationalist discourse, no material change — low RWI.