How did the transition for hunter- gatherer to farmer- herder lead to civilization?

River on northern boundary of roman empire? How did the introduction of easy credit and installment plans during the 1920's affect American culture? Where did the name hillbilly originate? Which were the largest germanic kingdoms? What is the movement of goods and ideas from one culture to another called? How did Muslims unintentionally help the Europeans take over tradewith eastern Asia? When did wall street begin? What did people in the Middle Ages drink? How did the transcontinental railroad effect the cowboys and cattle men? Why do you think Roman general Crassus was eager to fight Spartacus and his men? When did the roaring 20s start? Who is the inventor of steam ship? How could the crusades been avoided? What year is the 5th century? How did the Sui dynasty bring an end to the civil wars? Is America in the western or eastern hemisphere? Does a new millennium start in 2000 or 2001? When did the renaissance start and end? When did the Roman Emperor septimius severus rule Roman? What was the Mongol Yoke?