'As much as anything, World War I turned on the fate of Ukraine...' The decision to go to war in 1914 had catastrophic consequences for Russia. The result was revolution, civil war and famine in 1917–20, followed by decades of Communist rule. Dominic Lieven explains why this suicidal decision was made and explores the world of the men who made it. But by looking at the origins and results of the First World War from a mostly Russian angle he also offers a radically different view of why Europe descended into disaster, overturning assumptions about the war's causes and consequences in a way that still has major implications for world history down to the present day. Chaired by Oliver Bullough.