I’m surprised this article didn’t try to link this with an evolutionary advantage as so many others do. Think back on all the articles about altruism, racism, monogamy vs polygamy, machismo, theft, sex for goods, etc, that have been said to be evolutionarily imbedded in our psyches.
Actually, brain studies have been done that show certain areas of the brain are activated differently in different types of people. One area is associated with people whose preferred behavior is rule based and tribal. The other area is called Utilitarian and relates to behavior that is based on logic and inquiry. Roughly tends to relate to more conservative and more liberal mind sets. Or to more religious or more scientific orientations.