Who is the person whom you believe has contributed the most to U.S. history from 1900 to 1940 in his or her field or to the nation as a whole, and why?
The immigrants contributed significantly to United States history from the period 1900 to 1940. Immigration was widely spread in the North while the South (aside from slave immigration) remained mostly American born citizens...about 14.5% of the population were immigrants and it was a huge force for the labor industries
