Although Glowacki proposed that peace developed from the relatively recent advent of intergroup norms and tolerance for out-group members, we submit that (a) positive intergroup relations developed from a psychology grounded in the regulation of intragroup relations, (b) the “default” intergroup orientation is uncertainty, and (c) positive intergroup relations likely existed early in our evolutionary history.

中文翻译：

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群体间关系的心理学植根于群体内的过程

尽管格洛瓦茨基提出，和平是从最近出现的群体间规范和对外群体成员的宽容中发展起来的，但我们认为，（a）积极的群体间关系是从基于群体内关系调节的心理学发展而来的，（b）“默认”群体间的取向是不确定的，并且（c）积极的群体间关系可能存在于我们进化史的早期。