Author Andrew Taylor shines a spotlight on 25 imperial hegemonies from every period of global history--from the Mongols of Genghis Khan who made Europe quake with fear during the 13th century to the dizzying rise of Hitler's Third Reich in the 20th century. Taylor also examines the ways in which imperial structures collapse, their reliance on single, powerful individuals, and the way they cope with the problem of disparate peoples and religions within their borders.