Glowacki asserts that interdependent relationships beyond group boundaries are exceptionally rare among nonhuman mammals. However, rudimentary forms of interdependence can be seen in primate species that form multilevel societies, that is, core social units embedded within higher-level grouping categories. Studies of primate multilevel societies can enrich discussions about the evolutionary origins of peaceful between-group interactions in humans.

中文翻译：

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社会和经济相互依存是非人类灵长类动物和人类群体间和平关系的基础

格洛瓦茨基断言，在非人类哺乳动物中，超越群体界限的相互依存关系极为罕见。然而，在形成多层次社会的灵长类动物中可以看到基本形式的相互依存，即嵌入更高层次分组类别的核心社会单位。对灵长类多层次社会的研究可以丰富关于人类群体间和平互动的进化起源的讨论。