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...

Abu al-Qasim Khalaf ibn al-Abbas Al-Zahrawi was born near Cordoba, Spain, when it was part of the Islamic Empire. He was a physician, surgeon and chemist. He is best remembered for his encyclopedia of medicine, the Al-Tasrif li man ajaz an-il-talif (An Aid for Those Who Lack the Capacity to Read Big Books), known as the al-Tasrif. This became a standard reference in Islamic and European...

Three men of giant stature dominated Islamic history in the 10th century. These were Abdur Rahman III of Spain, Muiz of Egypt and Mahmud of Ghazna. The first two determined the flow of historical events in the Mediterranean region, whereas Mahmud of Ghazna had a decisive impact on Central Asia and the Indo-Pakistan subcontinent. Abdur Rahman III was the ablest and most accomplished of the...

Not since the Battle of Badr had the Islamic world stood face to face with extinction as it did at the Battle of Ayn Jalut. Just as the Prophet had triumphed at Badr 600 years earlier, the Mamlukes triumphed over the combined armies of the Mongols, the Crusaders and the Armenians at the Battle of Ayn Jalut. The Muslim world survived by a margin that was as small as any allowed by history to any...