Laurie Santos teaches the most popular class in the history of Yale University. About one in four Yale students take it. On Wednesday she gave an abridged, one-hour version of her class to a packed, oversized conference room at Skadden Arps Slate Meagher & Flom’s New York office in Times Square. The class wasn’t about finance, time management or crafting convincing arguments. It was about happiness.

This begs a couple of questions: Why are students at Yale so unhappy that 25% of them feel the need to take a course on being happy, and what does this have to do with the legal profession?