In-group bias is ingrained in humans
News: Adults and children–even children as young as three–“are really quick to sort themselves into … social groups and to form a preference for their in-group.” This tendency has been found in people–again, even children–across “gender, race or ethnicity, language, nationality, and religion.” Decades of research indicate that in-group favoritism occurs even when the group is based on very superficial criteria; the group does not…
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