How did industrialization during the 1800s contribute to the development of organized labor

What was the industrialization of the United States during the late 19th century a result of? ... Why was the formation of labor unions an effect of the U.S. industrialization in the late 1800s? Unions organized industrial workers to protest unsafe working conditions and long workdays.

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each played a major role in ending the cold war.

the growing interconnectedness of the world through communication, trade, and the exchange of ideas is an important theme in the history of the 20th and 21st centuries.

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