Difficulties remain even if the race theory is confined to the white man. The Semites would recall the civilizations of Babylonia, Assyria, Syria, Palestine, Phoenicia, Carthage, and Islam. The Jews gave the Bible and Christianity to Europe, and much of the Koran to Mohammed. The Mohammedans could list the rulers, artists, poets, scientists, and philosophers who conquered and adorned a substantial portion of the white man’s world from Baghdad to Cordova while Western Europe groped through the Dark Ages (c. 565–c. 1095).