Ibn Khaldun
In 1401, 69-year-old scholar Ibn Khaldun lowered himself down Damascus's walls in a basket to meet the conquering Tamerlane face-to-face---a living test of his revolutionary theories about how civilizations rise and fall. Writing in 1375, Ibn Khaldun invented sociology by identifying asabiyyah (social cohesion) as the fundamental force in history, describing how prosperity weakens the bonds that hold societies together in predictable cycles.
Season 1
Episode 113
Religion