1900s in the United States

1900s in the United States
Public domain · source
Decades	1900s
President	William McKinley (1901), Theodore Roosevelt (1901–1909), William Howard Taft (1909)
Population	76,212,168 (1900), 92,228,496 (1910)

1900s in the United States was a decade of profound transformation, marking the nation's confident emergence as a global industrial power and imperial actor. The era was defined by rapid technological progress, intense social reform movements, and the assertive foreign policy of the Roosevelt administration. It bridged the Gilded Age and the Progressive Era, setting the stage for the modern American century.

Overview

The decade opened with the Pan-American Exposition in Buffalo, New York and the tragic assassination of William McKinley, which propelled the dynamic Theodore Roosevelt into the White House. The United States solidified its overseas empire following the Spanish–American War, administering Puerto Rico, Guam, and the Philippines, while establishing a protectorate over Cuba via the Platt Amendment. Domestically, the nation grappled with the immense power of trusts like Standard Oil and U.S. Steel, the struggles of organized labor exemplified by the Colorado Labor Wars, and the growing momentum of reformist causes from women's suffrage to prohibition.

Politics and government

The political landscape was dominated by the Progressive Era and the energetic leadership of Theodore Roosevelt. His administration pursued "trust-busting" through lawsuits against monopolies like the Northern Securities Company, championed consumer protection with the Pure Food and Drug Act and the Meat Inspection Act, and advanced conservation by establishing the United States Forest Service and numerous national monuments. Roosevelt's successor, William Howard Taft, continued antitrust efforts but faced rising dissent from the party's progressive wing. Key political figures included reformist Robert M. La Follette of Wisconsin and Democratic contender William Jennings Bryan. The Supreme Court, in cases like Lochner v. New York, often resisted regulatory reforms.

Economy and industry

The American economy experienced robust growth, driven by heavy industry, railroad expansion, and financial consolidation under bankers like J.P. Morgan. The Ford Motor Company, founded by Henry Ford, introduced the Ford Model T in 1908, revolutionizing personal transportation and manufacturing through the moving assembly line. Major industrial events included the Panic of 1907, which led to the creation of the Federal Reserve System, and the devastating San Francisco earthquake of 1906. Labor unrest was widespread, seen in strikes by the Western Federation of Miners and the Industrial Workers of the World (IWW). The United States Department of Commerce and Labor was established in 1903 to oversee economic affairs.

Society and culture

American society was characterized by massive immigration, primarily from Southern Europe and Eastern Europe, leading to burgeoning urban populations and often strained race relations. The influential NAACP was founded in 1909 by figures including W.E.B. Du Bois to combat racial violence and inequality. Culturally, the decade saw the rise of vaudeville, ragtime music pioneered by Scott Joplin, and the birth of modern cinema with *The Great Train Robbery*. Literature flourished with the works of Mark Twain, Henry James, and Upton Sinclair's muckraking novel The Jungle. Architecturally, the Flatiron Building and Pennsylvania Station reshaped city skylines.

Science and technology

Technological innovation accelerated daily life and expanded horizons. The Wright brothers achieved the first controlled, powered flight at Kitty Hawk in 1903. Lee De Forest invented the Audion vacuum tube, a cornerstone of electronics and radio. In medicine, Walter Reed confirmed the role of mosquitoes in transmitting yellow fever, and the American Medical Association was reorganized. Pioneering work in physics was conducted by Albert A. Michelson, the first American to win a Nobel Prize. Urban infrastructure was transformed by the opening of the first New York City Subway line in 1904 and the completion of major projects like the Williamsburg Bridge.

Foreign affairs and military

The United States pursued an assertive, interventionist foreign policy under the Roosevelt Corollary to the Monroe Doctrine, positioning itself as the hemispheric policeman. This was demonstrated by the Venezuelan crisis of 1902–1903 and the occupation of the Dominican Republic. Roosevelt mediated the end of the Russo-Japanese War at the Treaty of Portsmouth, winning a Nobel Peace Prize. The decade saw the culmination of the Philippine–American War and the beginning of the Moro Rebellion. The Great White Fleet's world tour from 1907 to 1909 showcased American naval power. The U.S. also secured the Hay–Bunau-Varilla Treaty, granting it control over the Panama Canal Zone and commencing construction of the Panama Canal.

Category:1900s in the United States Category:20th century in the United States