More than a thousand years before modern nations established cloak and dagger intelligence agencies, the art of political assassination was perfected in West Asia. The architect of this art was Hassan al Sabbah, a shadowy character shrouded in exotic mystery about whom as much information has come down to us as misinformation. The Seljuks tilted the internal balance of power within the Islamic...

Civilizations collide when the transcendental values that govern them are used to define identity. During the Crusades, the Christian belief that God was immanent in the person of Jesus Christ collided with the Islamic vision that God is transcendent. For the Christian world all that was holy and venerable was embodied in the Cross of the Holy Sepulcher on which Jesus is believed to have been...

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...