For much of its history, the United States kept the rest of the world at arm’s length. What happened in the decades after the 1941 military strike on Pearl Harbor, and several years after the 9/11 attacks, could be seen as an aberration.

The sudden, chaotic withdrawal from Afghanistan, the Taliban takeover, and resulting humanitarian disaster may lead to another American foreign policy shift, plus a far greater reluctance to deploy U.S. forces overseas. While isolationism is derided by policy experts and global elites, this movement has a surprisingly enduring legacy. We examine it here.

Charles Kupchan is a professor of international relations at Georgetown University and a Senior Fellow at the Council on Foreign Relations. "Isolationism: A History of America’s Efforts to Shield Itself from the World" is his most recent book. We share extracts from an interview with Charles by Justin Kempf, host of the Democracy Group podcast, "Democracy Paradox".