The document summarizes patterns of old and new immigration to the United States. The old immigration from 1830-1880 saw many arrivals from northern and western Europe, especially Ireland and Germany fleeing famine and political unrest. The new immigration from the late 1800s to early 1900s saw immigrants mainly from southern and eastern Europe like Italy, Russia, and Poland settling in ethnic neighborhoods in American cities. Some native-born Americans worried these immigrants would not assimilate and resented them for lowering wages, leading to discriminatory groups and laws against Catholic and Chinese immigrants.