Between 1880 and 1920, more than 20 million immigrants arrived, most from Southern and Eastern Europe. Historians call this the "new immigration" to separate it from earlier waves of mostly Irish, German and British newcomers. Push factors included poverty, crowded farmland and pogroms, which were organized mob violence against Jews in the Russian Empire. Pull factors included factory jobs, higher wages and letters from relatives already here. Many passed through Ellis Island in New York, which opened in 1892. On the West Coast, Angel Island (opened 1910) processed Asian arrivals under much harsher questioning.
Immigrants, along with Americans leaving farms, made cities grow fast. Chicago went from about 300,000 people in 1870 to 1.7 million in 1900. Newcomers crowded into tenements, cramped apartment buildings with little light, air or plumbing, which Jacob Riis photographed in How the Other Half Lives (1890). The 1911 Triangle Shirtwaist fire in New York killed 146 garment workers, mostly young immigrant women.
Political machines such as Tammany Hall in New York traded jobs, food and help with the law for votes. They were corrupt (Boss Tweed's ring stole millions), but they offered services that city governments didn't. Nativism grew alongside immigration. The Chinese Exclusion Act of 1882 restricted the immigration of Chinese laborers based on their nationality. Nativist pressure later produced the quota laws of the 1920s.
- New immigration: The wave of immigrants from about 1880 to 1920, mostly from Southern and Eastern Europe, such as Italians, Poles, Greeks and Russian Jews.
- Tenement: A cheaply built, overcrowded city apartment building where many immigrant families lived with poor ventilation and sanitation.
- Political machine: A city party organization, led by a boss, that kept power by giving favors and jobs to voters in exchange for loyalty.
Why did many poor immigrants support political machines even though the machines were corrupt? Machines offered jobs, food, help with housing and the police, and a way into politics in exchange for votes. City governments often didn't provide those services.