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 is said among Muslims that the hills of El Pujarra around Granada still weep for the sound of the adhan every morning and the mosque of Cordoba stays awake all night waiting for the sajda of a single momin. To this day Andalus evokes among Muslims nostalgia for a golden age when it resonated with the sound of prayer every morning and the name of Prophet Muhammed (p)...

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...

The fall of Jerusalem was the price paid by the Muslims for the continued civil wars brought on by competing Sunni and Shi’a visions of Islamic history. The Crusades, declared in 996, were an intercontinental invasion across a front line extending more than 3,000 miles from Spain to Palestine. At the time, the house of Islam was divided into three households. The Turks championed the...