Final answer:
The statement about the 'criminal conspiracy' doctrine involving unionization and factory closures is false. The history of unionization in the U.S. is characterized by fluctuating legal support and opposition from businesses advocating for the individual work ethic.
Step-by-step explanation:
The doctrine of "criminal conspiracy" does not involve employees' rights to organize unions nor the effect of employee dissatisfaction leading to the closing of factories, so the statement is false. The history of unionization in the U.S. reveals a complex relationship between workers, businesses, and the government. In the 1930s, union membership surged following the passage of the National Labor Relations Act of 1935, which granted workers the right to organize. During WWII, the government even promoted unions. Post-WWII, however, legislation like the Taft-Hartley Act of 1947 made the legal environment less favorable for unions, allowing workers to opt-out, which led to a decline in union membership. The business perspective that championed individual work ethic and freedom from collective bargaining was also a notable obstacle for the labor movement.