Commentary
In 2018, 1,200 Yale undergraduates crowded into one of the university’s largest venues, Battell Chapel, ready to listen and learn. But the students sitting in the glow of the chapel’s stained-glass windows, who made up almost a quarter of Yale’s undergraduate population, were not there for a church service. They were there for the most popular class in Yale’s 316-year history: Psychology and the Good Life—or, as it was more colloquially known, “the happiness class.”