Because it was when America was separating from the British to make america its own country.
It could be stated some of this was due to the start of the 2nd world war, but one of the bigger parts would be the smuggling of alcohol on the black market and the large amount of different religions, currently flooding in in such a large wave.
A) cities were separated by categories such as class, race, and ethnicity
Major federal programs and agencies included the Civilian Conservation Corps (CCC), the Civil Works Administration (CWA), the Farm Security Administration (FSA), the National Industrial Recovery Act of 1933 (NIRA) and the Social Security Administration (SSA).
