The amendment repealed by the 21st Amendment was the 18th Amendment, the Prohibition amendment ratified in 1919. The 21st Amendment, ratified December 5, 1933, did more than erase the 18th: Section 2 of the new amendment also handed the repealed amendment's enforcement power back to the states. That second section is why national Prohibition ended in 1933 while statewide alcohol bans continued for decades afterward.
The Repeal Mechanism Hidden in Article V
Article V of the Constitution describes two ways to amend it and says nothing explicit about withdrawal. When the 21st Amendment was drafted, members of Congress worried that a state could ratify repeal and later claim its old 18th Amendment ratification still stood. The text closed that loophole twice over.
Section 1 of the 21st Amendment states plainly: "The eighteenth article of amendment to the Constitution of the United States is hereby repealed." That clause is self-executing. The moment the 36th state convention approved on December 5, 1933, the 18th Amendment lost constitutional force, with no congressional action required.
Section 3 barred the old route entirely. It required ratification by state conventions rather than state legislatures. Supporters chose conventions because they were faster and insulated from legislators elected with "dry" majorities. The 21st Amendment remains the only amendment ratified by conventions.
The deeper mechanism sits in Section 2: "The transportation or importation into any State, Territory, or possession of the United States for delivery or use therein of intoxicating liquors, in violation of the laws thereof, is hereby prohibited." Repeal did not deregulate alcohol. It switched the regulatory default from national prohibition to state police power.
Plainly: the 18th Amendment banned alcohol everywhere, and the 21st ended that ban while letting each state write its own rules.
Nineteen Years, 36 Conventions: A Quantified History
Prohibition was ambitious in scale. The 18th Amendment banned the manufacture, sale, and transportation of "intoxicating liquors" nationwide, effective January 17, 1920. The National Prohibition Act, known as the Volstead Act, set the enforcement threshold at 0.5 percent alcohol by volume, which pulled beer and wine into the ban.
The period's numbers explain why repeal gathered speed:
Timeline length: roughly 13 years and 10 months of national Prohibition, from January 17, 1920, to December 5, 1933. Ratification threshold: 36 of 48 states, a three-quarters supermajority under the Article V convention route. Speed of repeal: Congress passed the Blaine Act in February 1933 to submit repeal; full ratification took about 10 months. Amendment count: 18 total amendments by 1933, with the 18th reversed by the 21st, a unique occurrence. Volstead threshold: 0.5 percent alcohol by volume, the line between legal and illegal.
A timeline table makes the sequence concrete.
| Date | Event | Constitutional effect |
|---|---|---|
| January 16, 1919 | 18th Amendment ratified | Prohibition set to begin one year later |
| October 28, 1919 | Volstead Act passed over President Wilson's veto | Defined "intoxicating" at 0.5 percent ABV |
| January 17, 1920 | Prohibition takes effect | Nationwide ban operative |
| March 22, 1933 | Beer-Wine Revenue Act signed | Legalized 3.2 percent beer in some states |
| February 20, 1933 | Blaine Act submits repeal to states | Opened convention ratification process |
| December 5, 1933 | 36th convention ratifies 21st Amendment | 18th Amendment repealed |
| December 15, 1933 | 21st Amendment certified | Repeal formally in force |
Utah's convention supplied the decisive 36th vote on December 5, 1933. Pennsylvania and Ohio followed the same day, and by December 11 the count reached 38. The 18th Amendment had been ratified in about 13 months; repeal took a bit less once Congress acted.
The counterintuitive detail is the role reversal: the "dry" Utah delegation flipped the decisive vote. Years later, Utah became the state that ended national Prohibition.
Edge Cases: How Repeal Was Interpreted Against the Old Text
Constitutional mechanics rarely create clean breaks. Repeal raised a cluster of boundary questions.
One common misreading is that repeal voided every Prohibition enforcement statute. It did not. The Webb-Kenyon Act of 1913 already restricted liquor shipments into states that banned alcohol, and the 21st Amendment's Section 2 effectively constitutionalized that arrangement. Federal enforcement of the 18th Amendment likewise ended without invalidating private contracts, tax liens, or completed prosecutions.
A subtler case involves the three-tier system. After 1933, most states separated producers, distributors, and retailers by law, and the 21st Amendment's commerce language gave them cover to enforce it. Courts have read Section 2 as granting states broad latitude over alcohol traffic, with the Supreme Court addressing dormant Commerce Clause limits repeatedly.
Historical records also show a piecemeal legislative unwind. The Cullen-Harrison Act of March 22, 1933 legalized beer and wine at 3.2 percent alcohol by weight, roughly 4 percent by volume, in states that opted in. Nineteen states did so immediately. The 21st Amendment then removed the remaining federal ceiling.
These details matter because they explain why repeal was not a single switch. It was a layered withdrawal of federal prohibitions that left state and local options intact, and some dry counties still exist.
Misconceptions: What Repeal Did Not Do
Several widely repeated claims about the 21st Amendment are wrong or incomplete.
It did not "end Prohibition" across the country in a uniform sense. Section 2 preserved state authority, and Mississippi, the last statewide dry holdout, did not repeal its own ban until 1966. Kansas kept a public-bar ban into the 1980s.
It was not ratified by state legislatures. The convention requirement was deliberate and remains the only such ratification in American history. The 18th and 21st amendments are the only pair where one explicitly reverses the other.
Many sources claim repeal was driven solely by the Great Depression. Revenue losses mattered: federal liquor excise collections were effectively zero during Prohibition, and the Beer-Wine Revenue Act was partly a fiscal move. But organized repeal campaigns, crime statistics, and the 1932 election all fed the outcome too.
One professional caveat: the 21st Amendment did not restore the pre-1920 legal landscape. It created a new constitutional baseline in which alcohol is lawful federally but heavily regulated locally. Comparing 1933 to 1919 misses that structural shift.
Another mistake is treating repeal as instantaneous at the federal level. The 18th Amendment lost force December 5, and federal certification followed ten days later. Meanwhile, states with their own bans were unaffected until they acted.
Practical Actions: How to Research Amendment Repeal and Alcohol Law
For students, teachers, and writers who need to verify the repeal story, the following steps keep facts clean.
Read the full text of the 18th and 21st Amendments from the National Archives side by side; note Section 2's state-power language. Check the ratification date table from the Office of the Federal Register; it lists the 36th convention as December 5, 1933. Distinguish ratification from certification; the two dates differ by ten days. Separate federal repeal from state repeal; look up each state's post-1933 alcohol statutes. Use the National Constitution Center or Congressional Research Service for scholarly discussion of Section 2 case law. Treat 0.5 percent ABV as the historical Volstead threshold, not a current legal limit for nonalcoholic beer, which varies by state.
One reconciled threshold: the 18th Amendment did not define "intoxicating liquors" numerically. The Volstead Act did, at 0.5 percent ABV. The 21st Amendment repealed the amendment but not every statute built on it; state codes now set their own limits, commonly at 0.5 percent ABV for "nonintoxicating" status.
Limitations: What the Record Cannot Resolve Cleanly
Several aspects of the repeal remain interpretive rather than settled.
The historical record cannot say how many conventions were held or how many delegates attended each, because state records are uneven. No tally shows exactly how many states had operational dry laws on December 5, 1933. The 36 count is verified; the downstream effect is not fully cataloged.
Legal scholars still debate how far Section 2's state-power grant reaches into interstate commerce. Cases like Granholm v. Heald in 2005 struck down discriminatory wine shipping laws, and the line between valid state control and impermissible protectionism is drawn case by case. No single threshold reconciles the 21st Amendment's state authority with the Commerce Clause.
Readers checking dates for research should prefer the Office of the Federal Register over secondary timelines, which sometimes confuse the Blaine Act's passage with ratification. Numbers cited here rely on archival records and constitutional text, not on contested secondary statistics.
[High-stakes disclaimer: This article provides general educational information about constitutional history and law, not legal advice or an opinion on alcohol regulation in any jurisdiction. It does not promise outcomes and does not replace consultation with a qualified attorney or your state alcohol control board. Do not act on these details for compliance or licensing decisions without local professional guidance.]