| •1874 | Woman's Christian Temperance Union founded |
| •1889 | Jane Addams and Ellen Starr establish Hull House |
| •1890 | National American Woman Suffrage Association formed |
| •1895 | Booker T. Washington delivers Atlanta address |
| •1900 | First commission form of government established in Galveston, Texas |
| •1902 | President Roosevelt settles coal strike |
| •1903 | National Women's Trade Union League founded |
| •1906 | Meat Inspection Act and Pure Food and Drug Act |
| •1908 | Race riot in Springfield, Illinois |
| •1909 | National Association for the Advancement of Colored People founded |
| •1910 | President Taft fires Gifford Pinchot |
| •1912 | Roosevelt forms Progressive Party |
| Children's Bureau of the Department of Commerce and Labor established |
| •1913 | Sixteenth Amendment (graduated income tax) ratified |
| Federal Reserve System created |
| •1914 | Harrison Narcotics Control Act |
| Federal Trade Commission created |
| Clayton Antitrust Act |
| •1916 | Keating-Owen Act |
| Workmen's Compensation Act |
| •1919 | Eighteenth Amendment (prohibition) ratified |
| •1920 | Nineteenth Amendment (women's vote) ratified |