1889	Jane Addams opens Hull House.
1896	Plessy v. Ferguson.
1900	Socialist Party founded.
1901	William McKinley assassinated; Theodore Roosevelt becomes president.
1902	Antitrust lawsuit filed against Northern Securities Company. Roosevelt mediates anthracite coal strike.
1903	Women's Trade Union League (WTUL) founded. Panama Canal construction begins.
1904	Roosevelt Corollary to Monroe Doctrine.
1905	Industrial Workers of the World (IWW) founded.
1906	Pure Food and Drug Act and Meat Inspection Act. Atlanta race riot. Hepburn Act.
1907	Panic on Wall Street. "Gentlemen's Agreement" with Japan.
1908	Muller v. Oregon. William Howard Taft elected president.
1909	Garment workers' strike. National Association for the Advancement of Colored People (NAACP) formed.
1911	Triangle fire.
1912	Roosevelt runs for president on Progressive Party ticket. Woodrow Wilson elected president.
1913	Suffragists march in Washington, D.C. Federal Reserve Act.
1914	Federal Trade Commission (FTC) created. Clayton Antitrust Act.
1916	Margaret Sanger opens first U.S. birth control clinic.