Sectional differences developed in the united states largely because 1. the federal government adopted a policy of neutrality 2. economic conditions and interests in each region varied 3. only northerners were represented at the constitutional convention 4. early presidents favored urban areas over rural areas

discovery of cape town-portuguese empire

development of africans language-dutch east india company

introduction of railway-british empire

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.