The Congress of Industrial Organizations (CIO) was a major labor organization in the United States that emerged in the 1930s, primarily focused on organizing workers in mass production industries. It aimed to unify various labor unions under a single umbrella, promoting collective bargaining and workers' rights. The CIO played a crucial role in the New Deal era, pushing for policies that benefitted industrial workers and helping to reshape the labor landscape during this transformative period in American history.
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