Final answer:
Labor unions aimed to protect the best interests of workers as they consisted of workers united for this purpose. They focused on improving working conditions, wages, and benefits, and had periods of collaboration and conflict with government and management.
Step-by-step explanation:
Labor unions were certain to advocate for the best interests of workers because labor unions were created by workers and made up of workers. These organizations concentrated on improving working conditions, wages, and benefits for their members. The history of labor unions is complex, with periods of significant influence and decline.
During times of economic strife or war, such as in the World War II era, labor unions often collaborated with the government and management to ensure maximum production and the well-being of their members, leading to benefits like the 'maintenance of membership' rule. However, as workplace legislation became more comprehensive, covering work conditions, overtime, and pensions, the perceived need for unions decreased among workers, leading to a decline in union membership.