In 1968, veteran Chair of the Senate Committee on Foreign Relations J. William Fulbright summoned a series of experts to a hearing on the Vietnam War and American foreign policy. The assembled academics were not asked to examine the minutiae of U.S. strategy and tactics in Vietnam, but to grapple with a more fundamental issue—what was the nature of revolution? The participants’ testimonies interrogated the nation's revolutionary past to understand and inform their perspectives on Vietnam, the limits of U.S. power, and the contested legacies of the American Revolution. The hearings illuminated the intellectual history of an underexplored theme in U.S. foreign relations history—a marked ambivalence toward other people's revolutions, especially in the twentieth century, and the consequences of this contradictory posture for the United States's self-image and foreign policy.