LONG BEFORE ISLAM was born, two worlds took shape between the Atlantic Ocean and the Bay of Bengal. Each coalesced around a different network of trade and travel routes; one of them, mainly sea routes; the other, land routes. If you look at ancient sea traffic, the Mediterranean emerges as the obvious center of world history, for it was here that the Mycenaeans, Cretans, Phoenicians, Lydians, Greeks, Romans, and so many other vigorous early cultures met and mingled. People who lived within striking distance of the Mediterranean could easily hear about and interact with anyone else who lived within striking distance of the Mediterranean, and so this great sea itself became an organizing force drawing diverse people into one another's narratives and weaving their destinies together to form the germ of a world history, and out of this came "Western civilization." If you look at ancient overland traffic, however, the Grand Central Station of the world was the nexus of roads and routes connecting the Indian subcontinent, Central Asia, the Iranian highlands, Mesopotamia, and Egypt, roads that ran within a territory ringed by rivers and seas-the Persian Gulf, the Indus and Oxus rivers; the Aral, Caspian, and Black seas; the Mediterranean, the Nile, and the Red Sea. This eventually became the Islamic world. Unfortunately, of it a name obscures the connectedness of the whole, and besides, the phrase Middle East assumes that one is standing in western Europe-if you're standing in the Persian highlands, for example, the so-called Middle East is actually the Middle West. Therefore, I prefer to call this whole area from the Indus to Istanbul the Middle World, because it lies between the Mediterranean world and the Chinese world. common usage assigns no single label to this second area. A portion of it is typically called the Middle East, but giving one part