📜History of American Business Unit 9 – WWI and the Roaring 20s Economy

World War I reshaped global politics and economics. The conflict's massive mobilization of resources and technological advancements led to significant changes in industry, finance, and international relations. The United States emerged as a major world power. The post-war "Roaring Twenties" saw rapid economic growth and social change in America. Mass production, consumerism, and new technologies fueled prosperity, while cultural shifts challenged traditional values. However, this boom set the stage for the Great Depression.

Key Events and Timeline

  • 1914: World War I began with the assassination of Archduke Franz Ferdinand of Austria-Hungary
  • 1917: The United States entered WWI after Germany resumed unrestricted submarine warfare
    • The Selective Service Act was passed, requiring all men aged 21-30 to register for the draft
  • 1918: The Allied powers launched a series of successful offensives, leading to the collapse of the Central Powers
    • The armistice was signed on November 11, 1918, ending the fighting in WWI
  • 1919: The Treaty of Versailles was signed, officially ending the war and establishing the League of Nations
  • 1920: The 18th Amendment went into effect, prohibiting the manufacture, sale, and transportation of alcohol in the United States
  • 1921-1922: The Washington Naval Conference led to a series of treaties limiting the naval arms race
  • 1928: Herbert Hoover was elected president, promising to continue the economic prosperity of the 1920s

Causes and Context

  • Nationalism and imperialism fueled tensions between European powers as they competed for colonies and influence
  • The alliance system divided Europe into two opposing camps (Triple Alliance and Triple Entente), increasing the risk of a large-scale conflict
  • The assassination of Archduke Franz Ferdinand by a Serbian nationalist served as the immediate trigger for the war
  • The United States initially remained neutral, but economic ties and German actions (Zimmermann Telegram and unrestricted submarine warfare) eventually led to American involvement
  • The Russian Revolution in 1917 led to Russia's withdrawal from the war and the rise of communism as a global political force

Economic Impact of WWI

  • The war led to a massive mobilization of resources and labor, with governments taking control of key industries
    • The U.S. government established agencies like the War Industries Board to coordinate production and allocation of resources
  • The demand for war materials and supplies led to a boom in industries such as steel, chemicals, and textiles
  • The cost of the war was financed through a combination of taxes, bonds, and borrowing, leading to a significant increase in government debt
  • The disruption of international trade and the destruction of infrastructure in Europe had long-lasting effects on the global economy
  • The war accelerated the shift of economic power from Europe to the United States, as American industries expanded to meet wartime demands

Technological Advancements

  • The development of aircraft and tanks revolutionized warfare and had significant implications for future conflicts
  • Advances in chemical weapons (mustard gas) and artillery led to new tactics and increased casualties
  • Improvements in communication technology, such as radio and telephone, enhanced coordination and command on the battlefield
  • Medical innovations, including the use of X-rays and the development of blood transfusions, saved countless lives
    • The influenza pandemic of 1918 led to further advances in public health and disease control
  • Mass production techniques, such as the assembly line, were refined during the war and later applied to consumer goods

Post-War Economic Boom

  • The 1920s saw a period of rapid economic growth and prosperity in the United States, known as the "Roaring Twenties"
  • The rise of mass production and consumerism led to the expansion of industries such as automobiles (Ford Model T), household appliances, and entertainment
  • The widespread adoption of electricity and the growth of the advertising industry fueled consumer spending
  • The stock market experienced a significant boom, with many Americans investing in stocks and real estate
  • The agricultural sector struggled due to overproduction and falling prices, leading to a growing disparity between urban and rural areas

Social and Cultural Changes

  • The 1920s saw a rise in social liberalism and a challenge to traditional values, known as the "Jazz Age"
    • Women gained the right to vote with the passage of the 19th Amendment in 1920
  • The Harlem Renaissance celebrated African American culture and creativity in literature, music (jazz), and art
  • The prohibition of alcohol led to the rise of speakeasies, organized crime, and a general disregard for the law
  • The popularity of radio and motion pictures (silent films) created a new mass culture and transformed entertainment
  • The "Lost Generation" of writers and artists, disillusioned by the war, challenged traditional literary forms and themes

Government Policies and Regulations

  • The Fordney-McCumber Tariff of 1922 raised tariffs on imported goods to protect American industries
  • The Dawes Plan of 1924 provided a temporary solution to the issue of German war reparations and helped stabilize the German economy
  • The Federal Reserve pursued a policy of easy credit, contributing to the stock market boom and speculation
  • The Smoot-Hawley Tariff of 1930, enacted in response to the Great Depression, raised tariffs to record levels and exacerbated the global economic downturn
  • The Reconstruction Finance Corporation, established in 1932, provided loans to banks, railroads, and other businesses to stimulate the economy

Legacy and Long-Term Effects

  • The war and its aftermath redrew the map of Europe and the Middle East, with the collapse of empires (Ottoman Empire) and the creation of new nations
  • The League of Nations, though ultimately unsuccessful, paved the way for future international organizations like the United Nations
  • The economic boom of the 1920s was followed by the Great Depression, which had far-reaching social and political consequences
    • The New Deal policies implemented in response to the Depression expanded the role of the federal government in the economy and society
  • The rise of totalitarian regimes in Europe (Nazi Germany and the Soviet Union) and the unresolved tensions from WWI set the stage for World War II
  • The United States emerged from the war as a global economic and military power, setting the stage for its dominant role in the 20th century


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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.