God's War offers a sweeping new vision of one of history's most astounding events: the Crusades. From 1096 to 1500, European Christians fought to recreate the Middle East, Muslim Spain, and the pagan Baltic in the image of their God. The Crusades are perhaps both the most familiar and most misunderstood phenomena of the medieval world, and here Christopher Tyerman seeks to recreate, from the ground up, the centuries of violence committed as an act of religious devotion. The result is a stunning reinterpretation of the Crusades, revealed as both bloody political acts and a manifestation of a growing Christian communal identity. Tyerman uncovers a system of belief bound by aggression, paranoia, and wishful thinking, and a culture founded on war as an expression of worship, social...