 genuinely believed that they were creating, there was a sense of excitement, creativity, that people were fashioning a new human being and new relations among people. And Kennan was there during this ferment. A conversation on the life and works of George Kennan, a U.S. diplomat who was considered to be the architect of the Cold War. He would also become the Cold War's biggest critic. Our guest is Frank Castagliola. He is the author of the book, Kennan, A Life Between Worlds. That's next on Letters and Politics.