Charles A. Kupchan discusses his new book, Isolationism: A History of America’s Efforts to Shield Itself From the World. From the founding era until the Japanese attack on Pearl Harbor, the United States avoided strategic commitments abroad, with brief exceptions during the Spanish-American War and World War I. The United States then abandoned isolationism amid World War II and the Cold War, and instead embraced global engagement. Isolationism, however, is currently making a comeback as Americans pull away from foreign entanglement. Isolationism explores the enduring connection between the isolationist impulse and the American experience across the full arc of U.S. history. The CFR Fellows’ Book Launch series highlights new books by CFR fellows.