The history of the United States from 1918 through 1945 covers the post-World War I era, the Great Depression, and World War II. After World War I, the U.S. rejected the Treaty of Versailles and did not join the League of Nations.
In 1920, the manufacture, sale, import and export of alcohol was prohibited by an amendment to the United States Constitution. Possession of liquor, and drinking it, was never illegal. The overall level of alcohol consumption did go down, however, state and local governments avoided aggressive enforcement. The federal government was overwhelmed with cases, so that bootlegging and speakeasies flourished in every city, and well-organized criminal gangs exploded in numbers, finances, power, and influence on city politics.[1]
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Agriculture went through a bubble in soaring land prices that collapsed in 1921, and that sector remained depressed. Coal mining was shrinking as oil became the main energy source. Otherwise most sectors prospered. Prices were stable, and the Gross Domestic Product (GDP) grew steadily until 1929, when the financial bubble burst.
In foreign policy President Wilson helped found the League of Nations but the U.S. never joined it, as the Congress was reluctant to give up its constitutional role in declaring war. The nation instead took the initiative to disarm the world, most notably at the Washington Conference in 1921–22. Washington also stabilized the European economy through the Dawes Plan and the Young Plan. The Immigration Act of 1924 was aimed at stabilizing the traditional ethnic balance and strictly limiting the total inflow. The act completely blocked Asian immigrants, providing no means for them to get