History of Chicago

Chicago's flourishing economy attracted huge numbers of new immigrants from Europe and migrants from the Eastern United States. Of the total population in 1900 no less than 77% were foreign-born, or born in the United States of foreign parentage. Germans, Irish, Poles, Swedes and Czechs made up nearly two-thirds of the foreign-born population (by 1900, whites were 98.1% of the city's population).

Labor conflicts followed the industrial boom and the rapid expansion of the labor pool, including the Haymarket affair on May 4, 1886. Concern for social problems among Chicago's immigrant poor led Jane Addams to co‑found Hull House in 1889. Programs developed there became a model for the new field of social work.

During the 1870s and 1880s, Chicago attained national stature as the leader in the movement to improve public health. City, and later state laws, that upgraded standards for the medical profession and fought urban epidemics of cholera, small pox, and yellow fever were not only passed, but also enforced. These in turn became templates for public health reform in many other cities and states.

The city invested in many large, well-landscaped municipal parks, which also included public sanitation facilities