Dominic Tierney discusses his recent article, “The Iron Dice: Fatalism and War.” National leaders often exhibit fatalism, or the belief that events are guided by forces beyond their control. Fatalism can help leaders avoid responsibility for costly outcomes and protect their self-image. Drawing on case studies from World War I and II, Tierney shows how fatalism can be an important cause of war, especially when combined with a perceived window of opportunity. Fatalism is more likely in regard to bad outcomes, when war is seen as imminent, and in nondemocratic regimes.