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tual dependence-the non-zero-sum involved in wars and threats of war, strikes, negotiations, criminal deterrence, class war, race war, price war, and blackmail; maneuvering in a bureaucracy or a social hierarchy or in a traffic jam; and the coercion of one's own children-traditional game theory has not yielded comparable insight or advice. These are the games in which, though the element of conflict provides the dramatic interest, mutual dependence is part of the logical structure and demands some kind of collaboration or mutual ac-
Thomas C. Schelling (Mon,) studied this question.