Why did “ turn on, tune in, drop out” have an effect on the young people coming to San Francisco during the summer of love

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

"germany's geographic location was an advantage when it was on the offensive in the war because it was situated next to an extremely wide river, the rhine, which was difficult for the allies to cross."

a historian is attempting to study how the puritans affected society in new england

a system of cooperative federalism emerged, as the powers of the federal government expanded.