Guest: William Taubman is the Bertrand Snell Professor of Political Science Emeritus at Amherst College. He’s the author of many books, most notably of Khrushchev: The Man and His Era which won a Pulitzer Prize and the National Book Critics Circle Award. His new book is Gorbachev: His Life and Times is published by Norton. For more on Taubman’s work visit williamtaubmanbooks.com. Music: The Dramatics, “Get Up and Get Down,” Roots of Hip Hop, 2003.