The document summarizes key aspects of the United States between 1917-1933. It describes the US becoming the leading industrial economy prior to 1917 due to its vast natural resources, large immigrant workforce, and technological innovation. After entering WWI reluctantly in 1917, the US adopted an isolationist stance afterwards due to its traditions, dislike of Europe, and fears over ideologies like communism. The 1920s saw economic boom and a culture of consumerism but was followed by the Great Depression starting with the stock market crash of 1929.