Why was it necessary for sedentary communities to develop in ancient civilizations?

Which side used propaganda the most in world war 1? What strange and horrible things does calphurnia report to ceasar that been seen that night? What are the four countries that are large oil producers in southwest Asia? What was mats during ww11? What british football players has played in two European cup finals? Where does surname Norton originate? Where is the Bess Johnson Elkhorn Branch Library in Elkhorn located? What significant event in American history involved the throwing of tea into the harbor and is often associated with a specific type of container? Year in which Giuliano Medici was murdered in the Pazzi Conspiracy? What were baseball player Charlie Shoemaker's total batting stats for 1964? What power does nut the goddess of the sky have? What did the Hitchiti Tribe Eat? What was Alexander the great as a model? What have critics of Confederate General Robert E. Lee and the invasion of Maryland believe to be valid ones? Where is the Sphinx monument is located? Did Geoff Wellum marry his war-time girlfriend Grace? How were sitting bull and bill Cody friendship? What is the origin of Batten Down the Hatches? What is Louisianas neighboring states? Why do American footballers get down on one knee when a player is injured?