Definition
The Liquor Prohibition Amendment refers to the Eighteenth Amendment to the United States Constitution, ratified on January 16, 1919, and effective January 17, 1920. It was the first amendment to impose a substantive regulatory restriction directly on private conduct through the Constitution itself, rather than organizing government structure or protecting individual rights.
The Amendment operated in three sections:
1. It prohibited the manufacture, sale, or transportation of intoxicating liquors within the United States and all territory subject to its jurisdiction, as well as importation into and exportation from the United States, when intended for beverage purposes.
2. It granted Congress and the several states concurrent power to enforce the prohibition by appropriate legislation — a federalism provision without clear precedent in constitutional history.
3. It established a one-year delay between ratification and effectiveness, and required ratification within seven years — the first time a ratification deadline appeared in a proposed amendment.
The Amendment was repealed in its entirety by the Twenty-First Amendment, ratified December 5, 1933, making it the only constitutional amendment ever to have been repealed by a subsequent amendment.
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Common Language
Modern common usage (Wiktionary): "Prohibition" in ordinary English refers to a formal ban or the forbidding of something. In American popular usage, "Prohibition" (capitalized) refers specifically to the national ban on alcohol that lasted from 1920 to 1933.
Historical common usage (Webster's 1913): "Prohibition" — the act of prohibiting; a declaration or injunction forbidding some action; specifically, the forbidding by law of the sale and manufacture of alcoholic liquors.
Editorial note: The common usage of "Prohibition" and the legal instrument that created it — the Eighteenth Amendment — are frequently collapsed into each other in historical sources. Researchers should be precise: the Amendment was the constitutional authority; the Volstead Act (formally, the National Prohibition Act of 1919) was the federal enforcement legislation enacted under Section II's concurrent power grant. Popular sources routinely treat "Prohibition" as synonymous with the Volstead Act, obscuring the constitutional from the statutory layer — a distinction that mattered enormously in litigation.
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Common Confusion
Three distinct instruments are routinely conflated:
— The Eighteenth Amendment itself, which established the constitutional prohibition.
— The Volstead Act (1919), the principal federal enforcement statute passed under the Amendment's concurrent power clause.
— State prohibition laws, which predated the Amendment in many jurisdictions and continued to operate concurrently during the Amendment's effective period.
A second confusion involves the scope of the prohibition. The Amendment banned manufacture, sale, and transportation for beverage purposes — it did not on its face ban mere possession or consumption. Courts and enforcement agencies debated this line throughout the 1920s. The Volstead Act extended further in some respects and was narrower in others than the Amendment's plain text.
The word "concurrent" in Section II generated substantial constitutional controversy. It was disputed whether state power to enforce the Amendment was coequal with federal power, or whether federal law was supreme in cases of conflict. The Supreme Court addressed this in a cluster of decisions in the early 1920s.
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Why It Matters in Research
The Eighteenth Amendment sits at the intersection of constitutional law, federal-state relations, criminal law, and administrative regulation — making it a multi-corpus research target. Researchers navigating historical sources face several distinct traps.
First, periodization matters acutely. The Amendment was ratified in 1919 but effective in 1920; enforcement legislation was enacted in between. Sources from 1919 may discuss the Amendment as ratified law but describe enforcement as prospective. Pre-1920 legal commentary often treats the Amendment's scope as unsettled.
Second, state law variation is substantial. Many states had adopted their own prohibition regimes before 1919 through statutes or state constitutional amendments. Researchers using state reporters from the 1910s will encounter prohibition law that predates and is legally distinct from the federal constitutional prohibition. After 1920, some states adopted stricter enforcement laws than the Volstead Act; others refused enforcement cooperation.
Third, the concurrent power clause created a body of litigation with no close analogue elsewhere in constitutional law. Research into Section II enforcement questions requires attention to both federal and state court decisions, often running in parallel with different outcomes.
Fourth, the repeal in 1933 did not erase the legal history generated during the Amendment's operation. Criminal convictions entered under the Volstead Act were not automatically vacated. Contracts held void during Prohibition raised enforcement questions afterward. Researchers in commercial and contract law from the 1930s will encounter these transitional problems.
Fifth, the seven-year ratification deadline in Section III became the model for later proposed amendments. Research into the constitutional law of the amendment process — including the still-contested Equal Rights Amendment ratification history — traces directly back to this provision.
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Historical Dictionary Support
Bouvier's Law Dictionary reproduces the text of the Amendment's operative sections, which is the defining entry structure for constitutional provisions of this character. The entry reflects the Amendment in force and does not address repeal, which postdated Bouvier's relevant editions.
Bouvier's treatment is consistent with how all major historical legal dictionaries handled the Amendment: as a textual reproduction accompanied by minimal interpretive gloss. This reflects the period's assumption that the Amendment's meaning would be elaborated through case law rather than through dictionary commentary. For substantive interpretation — the meaning of "intoxicating liquors," the reach of "transportation," the scope of concurrent enforcement power — researchers cannot rely on dictionary sources of any era and must move directly to case reporters and the Volstead Act's legislative history.
Historical dictionaries uniformly omit the Twenty-First Amendment's effect on this provision. Any historical dictionary entry for this Amendment must be read with the knowledge that the Amendment it describes no longer exists as operative constitutional law.
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Jurisdictional Note
The Eighteenth Amendment applied to all United States territory and jurisdiction without exception. However, the Amendment's enforcement was substantially shaped by state-level action. States varied widely in whether and how aggressively they enforced the prohibition regime alongside federal authorities. Research into Prohibition-era criminal law requires consulting state as well as federal sources, since prosecution patterns, evidentiary rules, and sentencing differed significantly across jurisdictions.
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Encyclopedia Cross-Reference
Prohibition and Repeal — The Eighteenth and Twenty-First Amendments (The Law Mind Constitutional Law Encyclopedia)
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