Jonathan Eig spent four years researching and writing his 623-page biography of the greatest heavyweight fighter of all time, Muhammad Ali. In today's episode, Eig talks about Ali's private and public struggles, including his willingness to go to prison over his opposition to the Vietnam War, a decision that forced him out of the ring in his prime. Eig also discusses Ali's comeback, his "Rope-A-Dope" boxing strategy, and his legacy. Eig's book is, "Ali: A Life," just published by Houghton Mifflin Harcourt.Links:http://www.alialife.com/