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Figure 1. Sukuma in Tanzania...Click to Enlarge Image

Tanzania is a country troubled by political corruption and crime, but one of the country's many ethnic groups, the Sukuma, has recently achieved remarkable success in building sustainable communities with social controls. These rapidly created justice and economic systems require high levels of cooperation. Using anthropological techniques including an "ultimatum game," the authors examine the Sukuma's achievements as a case study in cultural evolution and argue that cooperative institutions promote adaptation.

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