Two years ago, Walter Isaacson, the legendary biographer who has written books about Steve Jobs, Albert Einstein, Benjamin Franklin, and Leonardo da Vinci, began shadowing Elon Musk. "I started off with a guy who was one of the most popular people on the planet," Isaacson says, "and ended up with a guy who's the most controversial." Today on the show, Isaacson unpacks those controversies.

In the 1950s, Shaker Heights, Ohio, became a national model for housing integration. In the 1970s, it was known as a crown jewel in the national move to racially integrate schools. So why is its school system now struggling to close a yawning racial achievement gap? Guest: Laura Meckler Book: “Dream Town: Shaker Heights and the Quest for Racial Equity” Host: Caleb Bissinger • Download the Next Big Idea app: nextbigideaclub.com/app