The role of the United States in the world is in question but it isn't the first time. David talked with Robert Kagan author of the new book "The Ghost at the Feast: America and the Collapse of World Order, 1900-1941" and what lessons we can take for it into our current moment. What pushed America into its super powered status? What resonances does an "America First" foreign policy have with his point in history? Find out the answer to these and other questions during this informative conversation.

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