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Letter to Science discussing: Henrich, J., Ensimger, J., McElreath, R., Barr, A., Barrett, C., Bolyanatz, A., Cardenas, J. C., Gurven, M., Gwako, E., Henrich, N., Lesorogol, C., Marlowe, F., Tracer, D., Ziker, J. (2010) Markets, Religion, Community Size, and the Evolution of Fairness and Punishment. Science, 327, 1480-1484.