Increased production during World War I necessitated more employees, especially in the steel and mining industries.
Inflation during the war eroded real wages, prompting calls for higher salaries and other benefits from employees and labor unions.
The war stimulated the development of new industries, notably aircraft manufacturing and shipbuilding, which provided fresh employment chances.
The War Department required companies to create shop committees made up of both management and employees to manage work-related problems, encouraging cooperation between the two parties.
The U.S. government recognized unions as legitimate entities to bargain collectively and improve working conditions during World War I.