Persona non grata
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What links here
Tit for tat
Ranjit Singh
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Frequency-dependent selection
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Three-spined stickleback
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Conflict resolution
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BitTorrent
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TFT
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Reciprocity
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Baedeker Blitz
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Quid pro quo
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Army Ballistic Missile Agency
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Laurel and Hardy
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Symmetry
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Reciprocal altruism
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The Selfish Gene
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Prisoner's dilemma
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The Evolution of Cooperation
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Provisional Irish Republican Army
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Foreign relations of Libya under Muammar Gaddafi
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Diplomatic immunity
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Altruism
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