How does what happened in the past affect us today?

Who is Susan agulkark? How the cotton gin changed peoples lives? What is the value of a 1936 US cent? What gave the rise to slave trade? Was John Henry Real? Why might colonists in a proprietary colony be unhappy if their colony were converted to a royal colony? What is the value of a 1935 G US silver certificate? Where did Jackson grow up? Why is lincolns head turned a different direction on a penny than others on silver coins? Why is a 10 cent coin called a penny? Why did northern oppose to slavery? When was a dollar bill invented? When did the federal emergency relief administration end? In what ways did the end of Prohibition mark the end of an era? What is the value of a 1960 US 100 dollar bill? What states were formed between 1791 -1803? What did the temperance movement try to do? Who are the individuals who represent special interest groups that try to influence congress and their bills? Who was the president during the great drepression and world war 2? What was the significances letter from a Birmingham Jail'?