Warfare and reproductive success in a tribal population
Warfare and reproductive success in a tribal population
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DOI：
10.1073/pnas.1412287112
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发表时间：
2015-01-13
影响因子：
11.1
通讯作者：
Wrangham, Richard
中科院分区：
文献类型：
--
作者：
Glowacki, Luke;Wrangham, Richard
群体间冲突是许多人类社会的一个持续特征，但人们对为什么个人参与会带来死亡风险知之甚少。为了评估是否参与战争与生殖的好处，我们提出的数据参与小规模牲畜袭击之间的Nyangatom，一组游牧牧民在东非。Nyangatom婚姻需要以牲畜的形式交换大量的新娘财富。袭击通常是为了捕捉牲畜，这就提出了这些牲畜是否以及如何转化为繁殖机会的问题。在短期内，袭击者的妻子或孩子数量并不比非袭击者多。然而，那些在年轻时被认定为多产袭击者的老人比其他老人拥有更多的妻子和孩子。袭击者并不更可能来自姐妹篇较少或哥哥较多的家庭。我们的研究结果表明，在这种文化背景下，突袭提供了机会，增加生殖成功的一生。
Intergroup conflict is a persistent feature of many human societies yet little is known about why individuals participate when doing so imposes a mortality risk. To evaluate whether participation in warfare is associated with reproductive benefits, we present data on participation in small-scale livestock raids among the Nyangatom, a group of nomadic pastoralists in East Africa. Nyangatom marriages require the exchange of a significant amount of bride-wealth in the form of livestock. Raids are usually intended to capture livestock, which raises the question of whether and how these livestock are converted into reproductive opportunities. Over the short term, raiders do not have a greater number of wives or children than nonraiders. However, elders who were identified as prolific raiders in their youth have more wives and children than other elders. Raiders were not more likely to come from families with fewer older maternal sisters or a greater number of older maternal brothers. Our results suggest that in this cultural context raiding provides opportunities for increased reproductive success over the lifetime.