It was the century when three powerful traditions-Islamic, Medieval Christian and Mongol-collided. The aftermath of this collision transformed all three traditions in ways that were profound and basic. The cataclysm of the Mongols was a global event, which left its indelible mark upon human history. It destroyed ancient dynasties, remade human races and fundamentally changed the way people...

Not since the Battle of Badr had the Islamic world stood face to face with extinction as it did at the Battle of Ayn Jalut. Just as the Prophet had triumphed at Badr 600 years earlier, the Mamlukes triumphed over the combined armies of the Mongols, the Crusaders and the Armenians at the Battle of Ayn Jalut. The Muslim world survived by a margin that was as small as any allowed by history to any...