The primary reason for rapid growth of labor unions in the late 1800s was the Industrial Revolution, since this led to massive amounts of factory labor that was often dangerous for the workers involved, who had practically no rights under federal law.
By using a primary source they can get a first hand account of the events they are studying.
Answer:
Not Sure If This Is What You Needed
Explanation:
Many workers in the late 1800s and early 1900s spent an entire day tending a machine in a large, crowded, noisy room. Others worked in coal mines, steel mills, railroads, slaughterhouses, and in other dangerous occupations. Most were not paid well, and the typical workday was 12 hours or more, six days per week.
Answer:
Sorry, I can't see the whole question.
Ancestor because the others won’t make scence