Throughout the historical period of this course, 1880-1945, workers' movements, especially labor unions, had uneven success. In the period from 1880 to the early 1930s, workers lost more battles than they won, but in the mid- and late-1930s this was reversed, so that by the end of the 1930s workers' advances far outpaced their losses. Write a paper describing this turnaround of the labor movement and explaining the causes for it. What part of this change was due to the foundations laid in earlier periods, and what part to new developments in the 1930s