"What makes a coach great? How do great coaches turn a collection of individuals into a coherent "us"? Seth Davis, one of the keenest minds in sports journalism, has been thinking about that question for twenty-five years. It's one of the things that drove him to write the definitive biography of college basketball's greatest coach, John Wooden, Wooden: A Coach's Life. But John Wooden coached a long time ago. The world has changed, and coaching has...