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。
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。
This could have happened at some point early in human evolution, when in order to survive, people were forced to cooperate in hunting game or gathering fruit.
这可能在人类社会进化早期的某个时候已经发生了，那时候为了生存，人们被迫合作打猎或采摘野果。
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