Business schools frequently do a negotiation experiment in which two groups are told to decide how a pile of oranges, which both groups need, should be split. Both groups are given specific details the other group can’t see. Much like in the Prisoner’s Dilemma, the bad guys do terribly. They assume the game is zero-sum: every orange they get is one the other group doesn’t get. But the cooperators, the people who share and communicate quickly, discover that the special instructions each person was given include a detail: one group only needs the fruit of the orange; the other group only needs
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