Summers now faces the prospect of an inglorious end to a career that has had high highs and low lows across decades in public life. Even for someone as resilient as Summers, it will be difficult for him to craft one last next act. And considering how many in Washington, Cambridge and beyond he antagonized with his infamous arrogance, there are many cheering his fall. In his youth, Summers showed almost unparalleled promise. He was an intellectual prodigy; at the age of 7, he could recite the names of John F. Kennedy’s Cabinet members. He appeared on a sports radio...