A divided Islamic world offered feeble resistance to the Crusaders who consolidated their hold on the eastern Mediterranean and imposed their fiefdoms on the region. The Seljuks, preoccupied with defending their eastern flank against the Afghan Ghaznavids, had thinned out their western defenses. The pagan Turkish tribes across the Amu Darya on the northeastern frontiers were a constant menace....

The Fatimid conquest of Egypt (969) was a defining moment in Islamic history. It destroyed any semblance of central authority in the Muslim world, provoked the reaction of the Turks as defenders of orthodox (Sunni) Islam, impelled the Omayyads in Spain to declare their own Caliphate, launched the powerful Murabitun revolution in western Africa, denied the Muslims their last chance to conquer...

It was a moment in history when the Islamic civilization opened its doors to new ideas from the East and from the West. The confident Muslims took these ideas and remolded them in a uniquely Islamic mold. Out of this caldron came Islamic art, architecture, astronomy, chemistry, mathematics, medicine, music, philosophy and ethics. Indeed the very process of Fiqh and its application to...