it was the result of the industrial revolution
left the Knights of Labor and joined the American Federation of Labor.
Increase in diversity
Migration from east to west increased
The migration of African Americans to the North during and following World War I was mainly a result of the availability of new factory jobs
migration from east to west increased
Mexican immigration
The migration of thousands of farmers to industrial cities.
Urbanization is the physical growth of urban areas as a result of rural migration
Working conditions began to improve for many workers.
The workers' conditions were met
an extra demand for workers
It was the concentration of workers in urbans areas.