The 18th Amendment to the U.S. Constitution banned the manufacture, sale, and transportation of alcoholic beverages throughout the United States. Ratified on January 16, 1919, and taking effect on January 17, 1920, it launched a nationwide prohibition on the liquor trade that lasted almost fourteen years before the 21st Amendment repealed it in December 1933.1Congress.gov. Overview of Eighteenth Amendment, Prohibition of Liquor It is the only amendment ever fully repealed, and the only one to try to regulate personal behavior across the whole country.
What the Amendment Actually Says
The text is short. Section 1 makes it illegal, one year after ratification, to make, sell, or transport alcoholic drinks anywhere in the United States, and bans imports and exports as well. Section 2 gives Congress and the states shared authority to enforce the ban through legislation. Section 3 gave the states seven years to ratify or the proposal would die.2Congress.gov. Constitution of the United States – Eighteenth Amendment
The seven-year clock didn’t come close to running out. Congress sent the amendment to the states in December 1917, and the three-fourths threshold was cleared in just over thirteen months. Eventually 46 of the 48 states ratified it; only Connecticut and Rhode Island refused.
What Was Banned, and What Wasn’t
The amendment targeted the supply side, not the drinker. Making, selling, and transporting alcohol became federal crimes. Drinking it did not. The text says nothing about possession or consumption in a private home.
The federal enforcement law drew the same line. Anyone who had legally bought liquor before Prohibition took effect could keep it and drink it, so long as it stayed “in the owner’s dwelling for use therein by him, his family, and his bona fide guests.”3Legal Information Institute. Volstead Act Americans who stocked their cellars before January 1920 could legally drink from them for years. A worker distilling moonshine in his basement was a criminal; his boss drinking pre-1920 scotch in his study was not.
How It Was Enforced: The Volstead Act
The amendment declared alcohol illegal but didn’t define “intoxicating liquor” or set penalties. That was the job of the National Prohibition Act, known as the Volstead Act after its sponsor, Minnesota Representative Andrew Volstead.4U.S. Senate. The Senate Overrides the President’s Veto of the Volstead Act
The Volstead Act set the threshold at any beverage containing more than one-half of one percent alcohol by volume.4U.S. Senate. The Senate Overrides the President’s Veto of the Volstead Act That wiped out nearly all beer, wine, and spirits sold in the country before 1920. Enforcement went to a Prohibition Unit inside the Bureau of Internal Revenue, the predecessor of today’s IRS.5Bureau of Alcohol, Tobacco, Firearms and Explosives. Prohibition Unit, Bureau of Internal Revenue A first conviction carried up to a $1,000 fine and up to six months in jail, with much stiffer penalties for repeat and large-scale offenders.6DocsTeach. Act of October 28, 1919 (Volstead Act)
Medicinal and Religious Exceptions
The Volstead Act carved out two narrow exceptions. Doctors could prescribe alcohol, usually whiskey or brandy, and patients could fill those prescriptions at pharmacies.7Smithsonian Institution. National Prohibition Act Prescription Form for Medicinal Liquor Religious organizations could obtain sacramental wine for services. Both exceptions were widely abused. The number of Americans who suddenly required medicinal whiskey climbed sharply after 1920.
Why Enforcement Failed
The Prohibition Unit was chronically underfunded and understaffed for the size of the task. Agents were asked to police a nation’s drinking habits with a fraction of the resources that would have required, and bribery of agents, police, judges, and politicians became a routine business expense for bootleggers.
Why the Amendment Passed in the First Place
The push for a national alcohol ban had been building for decades. Two groups drove it: the Women’s Christian Temperance Union, founded in 1873, and the Anti-Saloon League, which became the more politically aggressive force after 1900. Reformers tied alcohol to domestic violence, child abuse, political corruption, and poverty. Industrialists including Henry Ford supported the cause on the theory that sober workers were more productive. Protestant evangelical churches supplied much of the grassroots muscle.
One practical obstacle had long blocked a national ban: money. Before the federal income tax existed, alcohol excise taxes made up an estimated 30 to 40 percent of federal revenue. The 16th Amendment, ratified in 1913, created the income tax and removed the fiscal objection. Once the government had a replacement, the political path opened.
What Went Wrong
The amendment’s most dramatic legacy had nothing to do with public health. Eliminating the legal supply of alcohol without reducing demand handed an enormously profitable market to criminals.
Before 1920, criminal gangs were mostly local and disorganized. Liquor profits changed that. Gangs professionalized, hiring lawyers and accountants alongside armed enforcers, and built supply chains reaching from distilleries in Canada and Europe to thousands of illegal bars called speakeasies. At the peak of Prohibition in the late 1920s, an estimated 32,000 speakeasies operated in New York City alone. Chicago boss Al Capone reportedly took in around $100 million a year from liquor, gambling, and other rackets. More than 1,000 people were killed in mob fighting in New York during the Prohibition years. The terms “organized crime” and “syndicate” only entered common use after the ban took hold.
The legal economy took heavy losses too. Closing breweries, distilleries, and saloons eliminated tens of thousands of jobs directly, and thousands more disappeared in related trades. Roughly 175,000 people worked in the alcohol sector before Prohibition; by 1930 that figure had fallen below 10,000.
The federal revenue calculation also changed. The income tax had largely replaced alcohol taxes by 1920, but when the Great Depression hit in 1929, income tax receipts collapsed. The lost liquor revenue suddenly mattered a great deal, and the economic argument for repeal became hard to ignore.
How Prohibition Ended: The 21st Amendment
By the early 1930s, the amendment had lost most of its public support. It had not stopped drinking. It had created a vast black market, funded organized crime, and drained government resources at the moment the country could least afford the loss. Congress proposed the 21st Amendment on February 20, 1933, and it was ratified on December 5, 1933.8Constitution Annotated. Ratification of the Twenty-First Amendment
The 21st Amendment holds two unique places in constitutional history: it is the only amendment that repeals a previous one, and the only one ratified through state conventions rather than state legislatures. That procedural choice was deliberate. The temperance lobby still had enough pull with state legislators to make a legislative repeal vote risky, so specially elected convention delegates were used instead.
Section 1 of the 21st Amendment repealed the 18th. Section 2 returned regulatory authority over alcohol to individual states and made it a federal offense to ship liquor into any state in violation of that state’s own laws.8Constitution Annotated. Ratification of the Twenty-First Amendment States could stay dry if they wanted, and several did for years.
What’s Left of It Today
The 18th Amendment is still printed in the Constitution. It’s simply inoperative, overridden by the 21st. Hundreds of counties and municipalities across the country remain fully or partially dry under local-option laws, a direct product of the 21st Amendment’s decision to hand alcohol regulation back to the states rather than replace one national rule with another. The 18th itself is now cited most often as a cautionary example of using the Constitution to regulate personal behavior rather than the structure of government.