1. In 1919, the 18th Amendment was passed, prohibiting the manufacture, sale, and transportation of alcohol nationwide in order to curb alcohol consumption and change public morality.
2. However, this led to the rise of underground bars called speakeasies and organized crime groups who bootlegged and smuggled alcohol. Gangsters like Al Capone gained power through illegal alcohol distribution.
3. Prohibition was ultimately repealed in 1933 with the passage of the 21st Amendment due to its failure to achieve its moral goals and the economic losses of untaxed alcohol sales.