In 1976, the most famous athlete in the world, Muhammad Ali, squared off with the most famous wrestler in Japan, Antonio Inoki, at the Budokan in Tokyo. According to a new book from our guest, Josh Gross, despite the fact that the fight itself was widely panned and didn't do well financially, this seminal event paved the way for mixed martial arts and UFC, and instigated a shift in pro wrestling, pushing it towards the concept of "sports entertainment." Gross' new book, "Ali vs. Inoki: The Forgotten Fight That Inspired Mixed Martial Arts and Launched Sports Entertainment," gives the fascinating background on how the fight came together, as well as the aftermath. We discuss what led to the fight, how pro wrestlers taught Ali to promote, and just how big of a star Inoki is in Japan.