Psychological research shows that tribalism can be countered and overcome by teamwork: by projects that join individuals in a common task on an equal footing. One such task, it turns out, can be to reduce tribalism. In other words, with conscious effort, humans can break the tribal spiral, and many are trying. “You’d never know it from cable news or social media,” Chua writes, “but all over the country there are signs of people trying to cross divides and break out of their political tribes.”

