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...

Like a benevolent mother opening her arms to all the children in the neighborhood, Africa held its arms open for successive waves of refugees from Arabia. In turn, the immigrants brought with them the light of Islam and shared it with the people of Africa. This was the quid pro quo between Africa and Arabia: Africa gave protection to the Arabs. In turn, the Arabs shared their faith...

The Turks forced their way onto the world stage with thunderous momentum. Their galactic advance is marked by three critical events that provide historic benchmarks: the hiring of a Turkish guard by the Abbasid Caliph al Mu’tasim (833); the disappearance of the Samanid State based in Bukhara (999); and finally, the Battle of Manzikert (August 1072). After Caliph al Mu’tasim, the...