When thousands of europeans left there homes in the 1800's and 1900's how did this effect migration to the untied states.

Migration to the U.S. was enormous during the 1800s and early 1900s. The population of cities at ports of entry (Los Angeles and New York City) grew rapidly as immigrants poured into America. There was stiff competition for jobs. The new workers helped to build the nation’s infrastructure (roads, railroads, canals, etc). Africans were forced to migrate to work as slaves.

c, they united with once

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.