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  1.  33
    Intergroup Aggression in Chimpanzees and War in Nomadic Hunter-Gatherers.Richard W. Wrangham & Luke Glowacki - 2012 - Human Nature 23 (1):5-29.
    Chimpanzee and hunter-gatherer intergroup aggression differ in important ways, including humans having the ability to form peaceful relationships and alliances among groups. This paper nevertheless evaluates the hypothesis that intergroup aggression evolved according to the same functional principles in the two species—selection favoring a tendency to kill members of neighboring groups when killing could be carried out safely. According to this idea chimpanzees and humans are equally risk-averse when fighting. When self-sacrificial war practices are found in humans, therefore, they result (...)
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  2.  15
    The Role of Rewards in Motivating Participation in Simple Warfare.Luke Glowacki & Richard W. Wrangham - 2013 - Human Nature 24 (4):444-460.
    In the absence of explicit punitive sanctions, why do individuals voluntarily participate in intergroup warfare when doing so incurs a mortality risk? Here we consider the motivation of individuals for participating in warfare. We hypothesize that in addition to other considerations, individuals are incentivized by the possibility of rewards. We test a prediction of this “cultural rewards war-risk hypothesis” with ethnographic literature on warfare in small-scale societies. We find that a greater number of benefits from warfare is associated with a (...)
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  3.  7
    Self-Interest and the Design of Rules.Manvir Singh, Richard Wrangham & Luke Glowacki - 2017 - Human Nature 28 (4):457-480.
    Rules regulating social behavior raise challenging questions about cultural evolution in part because they frequently confer group-level benefits. Current multilevel selection theories contend that between-group processes interact with within-group processes to produce norms and institutions, but within-group processes have remained underspecified, leading to a recent emphasis on cultural group selection as the primary driver of cultural design. Here we present the self-interested enforcement hypothesis, which proposes that the design of rules importantly reflects the relative enforcement capacities of competing parties. We (...)
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  4. Self-Interested Agents Create, Maintain, and Modify Group-Functional Culture.Manvir Singh, Luke Glowacki & Richard W. Wrangham - 2016 - Behavioral and Brain Sciences 39.
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  5. The Cultural Evolution of War Rituals.Luke Glowacki - 2018 - Behavioral and Brain Sciences 41.
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