Why did the prospects of organized labor decline despite more than a half-century of intense organizing efforts?

Write a short essay on the following topic. Remember to fully address every part of the question. Pay attention to the construction of your argument and be sure that your answer has both a thesis and a conclusion. Please refer to specific evidence from the readings and topic videos in order to support your arguments.
Although the labor movement had struggled to establish itself since the end of the Civil War, it had reached one of its lowest points by the end of the 1920s. Why did the prospects of organized labor decline despite more than a half-century of intense organizing efforts? What explains the movement’s resurgence in the 1930s and how did it institutionalize this success after WWII?