Fault Lines welcomes Charles Kupchan, Senior Fellow at the Council on Foreign Relations and author of the book "Isolationism: A History of America's Efforts to Shield Itself from the World." What are the driving factors of American Isolationism throughout history? What lessons should President Biden learn from previous presidents? What is American Exceptionalism? Dr. Kupchan and host Les, answer these questions and many more on this week’s episode of Fault Lines!