If living hunter-gatherers are typical of ancient ones, the new data about their social pattern has considerable bearing on early human evolution.

如果现存的狩猎者-采集者还是像古代那样，那么这些关于他们社会模式的新数据对早期人类进化有重大意义。

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Experimental psychologist Professor Charles Spence, who contributed to the research paper, said the instinct is rooted in early human evolution.

参与了该实验论文的实验心理学家查尔斯·斯朋斯教授说，这种直觉源于人类进化。

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