1091. Various nomadic and seminomadic peoples played a role in the collapse of the classical Chinese and Roman empires and the subsequent rebuilding of those civilizations.2. Settled societies feared pastoral peoples, seeing them as bloodthirsty savages or barbarians who brought only chaos and destruction in their wake.3. The Mongol Empire resembled other empires in that it relied on the military capabilities of pastoral peoples; brought together numerous pastoral clans under a single leader; and relied on the extraction of resources from settled societies to hold its confederation together.4. In the Islamic world, the Mongol conquest of Persia resulted in the conversion of large numbers of Mongols to the Muslim faith. While Mongol domination of Persia did damage Persian agriculture, the Mongols had less of an impact on Persian government, as Mongol rulers made extensive use of the sophisticated Persian bureaucracy. Ultimately, a number of Mongols turned to farming, married local people, and were assimilated into Persian society.