He Was Paul Ryan’s Favorite Wonk. Now He’s a Self-Help Guru Writing Books With Oprah.

He Was Paul Ryan’s Favorite Wonk. Now He’s a Self-Help Guru Writing Books With Oprah.

On a Tuesday morning earlier this summer, Arthur Brooks strutted around a lecture hall at Harvard University’s Kennedy School of Government, preparing to kick off an event called the “Leadership and Happiness Symposium.” The symposium was a relatively staid affair, but Brooks had forgone the drab attire of academia in favor of a more colorful getup: a sleek blue-gray patterned suit jacket, a bright pink pocket square and brown dress shoes with b…