18th Amendment to the Constitution. Ratified in 1919, the 18th Amendment made it illegal to manufacture, transport, and sell alcoholic beverages. As a result, the 1920s are often referred to as the Prohibition Era.
The failure of the amendment (it was repealed in 1933) to curb the use of alcohol is one of the facts many individuals nowadays point to when debating in favor of legalizing drugs. "What did Prohibition accomplish?" they ask. Seemingly everyone who wanted to drink ignored the law and kept doing so. Furthermore, organized crime spiraled out of control, with mobsters like "Scarface Al" Capone, who took almost complete control of the city of Chicago during the 1920s, running rampant.
What do you think about the drugs being legalized?