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...

Embracing an area more than half a million square miles, the kingdom of Mali was undoubtedly one of the richest and most prosperous on earth in the 14th century. Its territory touched the Atlantic Ocean to the west and extended as far as the bend in the Niger River to the east. From north to south, it embraced the entire swath of land south of the Sahara to the thick tropical forests of...

Pivotal as Persia was in the political developments of Muslim Asia, its primary contribution was to preserve, reinvigorate and transmit the spiritual legacy of Islam through its language, art and architecture. While the Arabs provided the ideational foundation of the edifice of Islam, it was the Persians who adorned it with beauty and embellished it with spirituality. The primary medium for...