The document discusses the economic boom of the 1920s in the United States under Republican administrations. Republican presidents like Warren Harding, Calvin Coolidge, and Herbert Hoover pursued policies of deregulation and non-intervention that spurred rapid business growth. A consumer economy emerged as Americans purchased new household goods and automobiles in increasing numbers, often on installment plans and credit. However, this period of prosperity was built on unstable economic foundations that would contribute to the stock market crash and Great Depression of 1929.