An individual from the late 1800s and early 1900s who faced challenges and had a plan to overcome those challenges.

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

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porter is writing economic history because he is focusing on the cost of developing vaccines.