People give up some liberty in exchange for some protection of their remaining rights.
In the early 1900's, 6 million African Americans emigrated form the rural south of the US to the northeast, mid-west and west and thus began an urban existence in many of the cities in these areas so became important politically due to their numbers and their strong support of the civil rights movement later on.
Infrastructure includes as follows: Highways, local roads, and anything that deals with safe transportation
