Michael Morris breaks down how tribal instincts are behind your biggest life choices

You don’t have to look far to see tribalism in action.

In high school cliques. In Red vs. Blue. Even in the football team (whether it be NFL Sundays or Premier League Saturdays, no judgment here) you pledge your loyalty to.

It’s all over pop culture, too. Remember the Titans brought Black and white players into the same locker room, each carrying different rules, heroes, and histories. Mean Girls drew a hard line between the Plastics and everyone else. And, whether we care to admit it or n...