The 1920s were a period of dramatic changes. More than half of all Americans now lived in cities and the growing affordability of the automobile made people more mobile than ever. Although the decade was known as the era of the Charleston dance craze, jazz, and flapper fashions, in many respects it was also quite conservative. At the same time as hemlines went up and moral values seemed to decline, the nation saw the end of its open immigration policy, the revival of the Ku Klux Klan, and the trial of a Tennessee high‐school teacher for teaching evolution.
I am not sure if this is the answer you are looking for but I gave it a try!!
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.
Success in trade always deals with advertisement. In this case, the spread of Islam help distribute it's teachings and beliefs making more people contribute to trade.
He did not improvise or change, led to Burnside losing the Battle of Fredericksburg.
