Moral Tribes: Emotion, Reason, and the Gap Between Us and Them: Greene, Joshua, Foster, Mel

Our brains were designed for tribal life, for getting along with a select group of others (Us) and for fighting off everyone else (Them).

But modern times have forced the world’s tribes into a shared space, resulting in epic clashes of values along with unprecedented opportunities.

As the world shrinks, the moral lines that divide us become more salient and more puzzling.