In November 1951, the Dartmouth and Princeton football teams played a season-ending game that resulted in a seminal work on the nature of human cognition.
Princeton won the contest, to finish the season undefeated. Of more lasting consequence, though, was the research that followed — a psychological case study that provides a helpful overlay for today’s politics.
The game was exceedingly violent, with broken bones and a flurry of penalty flags. Subsequent news accounts stoked the controversy, with fans from each side blaming the other for the mayhem.
Intrigued, a pair of researchers undertook an experiment in which students at the Ivy League colleges filled out...