Transition from horses/buggies to automobiles/airplanes.
American involvement in two world wars and the Great Depression.
Emergence of the U.S. as a world leader by 1945.
Industrial, economic, and social transformations during this period.
Shift from a rural, agricultural economy to an urban, industrial one.
Growth of large corporations; cycles of economic booms and busts.
The Great Depression of the 1930s caused severe economic hardship.
Significant reform periods: Progressive Era and New Deal.
Progressives addressed economic instability:
Created the Federal Reserve to regulate banking and the business cycle.
Reformed corrupt election practices (direct elections of senators).
Women's suffrage movement leading to a constitutional amendment granting voting rights.
The New Deal established a limited welfare state to combat economic crises:
Laws regulating banks/stock markets and guaranteeing a minimum wage.
Introduction of Social Security and labor union protections.
Growth of mass media (radio, motion pictures) leading to cultural shifts.
Value conflicts emerged over education, religion, and science (e.g., evolution in schools).
Immigration debates and federal restrictions based on ethnicity/national origin.
Resurgent Ku Klux Klan targeted African Americans, Catholics, Jews, and immigrants.
Debates over imperialism and America’s global role heightened with the Spanish-American War.
Disagreement over involvement in World War I; rejection of League of Nations.
World War II established the U.S. as a global leader with significant economic, political, and military power.
Formation of the United Nations and commitment to collective security post-WWII.
Foreign policy shaped by alliances with Western Europe and anti-communism.
1898: Start of the Spanish-American War.
1901: Theodore Roosevelt becomes president.
1917: U.S. enters World War I.
1919: Versailles Treaty concludes World War I.
1924: Immigration Quota Law passed.
1929: Great Depression begins.
1933: Franklin Roosevelt implements the New Deal.
1941: U.S. enters World War II.
1945: U.S. drops atomic bombs on Japan; Franklin Roosevelt elected president.