The 18th Amendment to the United States Constitution, ratified in 1919, established the prohibition of alcohol. It made it illegal to manufacture, sell, or transport alcoholic beverages in the U.S. This amendment aimed to reduce crime and corruption, improve health, and strengthen families. However, the 18th Amendment led to unintended consequences, including the rise of illegal activities such as bootlegging and speakeasies. The negative effects of prohibition prompted public discontent, ultimately leading to its repeal in 1933 with the 21st Amendment, which restored the legal status of alcohol.