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Recent behavioral experiments aimed at understanding the evolutionary foundations of human cooperation have suggested that a willingness to engage in costly punishment, even in one-shot situations, may be part of human psychology and a key element in understanding our sociality. However, because most experiments have been confined to students in(More)
Large-scale societies in which strangers regularly engage in mutually beneficial transactions are puzzling. The evolutionary mechanisms associated with kinship and reciprocity, which underpin much of primate sociality, do not readily extend to large unrelated groups. Theory suggests that the evolution of such societies may have required norms and(More)
This study examines the influence of women's status in the household on family size and use of family planning in rural Kenya. The study relies on the theoretical framework of power relations of Lappe and Schurman (1990). The structure of decision-making power within the family, village, community, national governments, and international institutions(More)
Lamba and Mace's critique (1) of our research (2–4) is based on incorrect claims about our experiments and several misunderstandings of the theory underpinning our efforts. Their findings are consistent with our previous work and lead to no unique conclusions. Lambda and Mace (1) incorrectly claimed that we " mostly " sampled from single communities within(More)
Data from three bargaining games—the Dictator Game, the Ultimatum Game, and the Third-Party Punishment Game—played in 15 societies are presented. The societies range from US undergraduates to Amazonian, Arctic, and African hunter-gatherers. Behaviour within the games varies markedly across societies. The paper investigates whether this behavioural diversity(More)
I n an effort to capture the middle of the market integration spectrum, we included two modern farming communities in Africa in our cross-cultural world sample: the ethnically related Maragoli and Gusii of Kenya. Like many farmers in Kenya and other more developed countries on the continent, the Maragoli and the Gusii are well educated and highly(More)
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