1889
Jane Addams establishes Hull House
1890s
Wyoming, Colorado, Utah, and Idaho grant women suffrage
1900
Population of New York City reaches 4,023,000
1902
National Reclamations Act uses proceeds for public land sale to finance irrigation projects
1904
Lincoln Steffens exposes connections between corrupt politicians and businessmen in The Shame of the Cities
1905
Industrial Workers of the World union formed in Chicago
1906
Upton Sinclair exposes the meatpacking industry in The Jungle
1906
Pure Food and Drug Act
1906
Meat Inspection Act
1906
W.E.B. Du Bois and others organize Niagara Movement
1907&8211;14
Sterilization laws enacted in 1 states
1907&8211;24
3,000 Americans are involuntarily sterilized
1909
NAACP formed
1910
Mann Act prohibits transportation of women across state lines for "immoral purposes"
1912
Massachusetts passes first minimum-wage law
1912
Progressive party founded by Theodore Roosevelt
1912
Congress establishes a children’s bureau in the Department of Labor
1913
Henry Goddard writes The Kallikak Family
1913
Raker Act allows Hetch-Hetchy Reservoir to be built in Yosemite
National Park
1913
Sixteenth Amendment gives Congress power to impose federal tax on income from all sources
1913
IQ testing program instituted on Ellis Island
1914&8211;18
World War I
1919
Prohibition Act becomes law
1919
One car for every 16 Americans
1920
Nineteenth Amendment prohibits states from denying the vote on account of sex
1924
Indian Citizenship Act grants full U.S. citizenship to America's indigenous peoples
