The Murabitun revolution was one of the few genuine mass movements in Islamic history. Growing out of the womb of Africa, it engulfed two continents and played a decisive role in historical developments in Africa and Spain alike. As a mass movement, European as well as Muslim scholars have studied it extensively. Ibn Khaldun used it as a basis for his theory of the rise and fall of...

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...