The Eighteenth Amendment, ratified in 1919, banned the manufacture, sale, and transportation of intoxicating liquors in the United States, launching national Prohibition; it grew out of Progressive Era moral reform and remains the only constitutional amendment ever repealed (by the 21st Amendment in 1933).
The Eighteenth Amendment is the constitutional amendment that made Prohibition national law. Ratified in 1919 and taking effect in 1920, it outlawed the manufacture, sale, and transport of "intoxicating liquors" across the entire country. Notice what it did NOT ban: drinking alcohol itself. The amendment targeted the supply side, not the consumer.
It was the high-water mark of Progressive Era moral reform. Groups like the temperance movement had spent decades arguing that alcohol fueled crime, poverty, domestic abuse, and political corruption, and that the federal government should step in to fix a social problem. That's the bigger APUSH idea here. The Eighteenth Amendment is a case study in using federal power to legislate morality, and it backfired hard enough (bootlegging, organized crime, speakeasies, widespread lawbreaking) that it became the only amendment ever repealed, by the 21st Amendment in 1933.
The Eighteenth Amendment itself lives in the Progressive Era and 1920s material (Unit 7), but its real exam value stretches into Topic 8.14, Society in Transition, under learning objective APUSH 8.14.A, which asks you to explain the causes and effects of continuing policy debates about the role of the federal government over time. Prohibition is one of the cleanest examples of that debate in action. Reformers expanded federal power to enforce a moral standard, the country largely refused to comply, and the policy was reversed. That same tension between federal moral regulation and personal liberty resurfaces in the 1960s and 1970s, when conservatives challenged what they saw as cultural decline and clashed with liberals over social issues and the size of government (KC-8.2.III.E). If you can use the Eighteenth Amendment as the early chapter of that story, you're making exactly the kind of continuity argument the exam rewards.
Keep studying APUSH Unit 8
Volstead Act (Unit 7)
The amendment was the constitutional rule; the Volstead Act (1919) was the federal law that actually defined "intoxicating liquors" and set up enforcement. An amendment without an enforcement statute is just words on paper, and the Volstead Act's weak enforcement is a big reason Prohibition failed.
Speakeasies and 1920s culture (Unit 7)
Prohibition didn't stop drinking, it just pushed it underground. Speakeasies, bootlegging, and organized crime figures like Al Capone are the evidence you cite to show that the Eighteenth Amendment produced massive unintended consequences and widespread defiance of federal law.
19th Amendment (Unit 7)
Ratified one year later (1920), the 19th Amendment gave women the vote. The two are linked beyond timing. Many of the same women's organizations pushed both temperance and suffrage, so the amendments show how Progressive reform coalitions overlapped.
Debates over federal power and morality (Unit 8)
Topic 8.14 covers conservatives in the 1960s-70s reacting to perceived moral decline and fighting over how much the federal government should shape culture. Prohibition is the original version of that fight, which makes it perfect evidence for a change-and-continuity argument about government's role in regulating social behavior.
On multiple choice, the Eighteenth Amendment usually shows up attached to a Progressive Era source, like a temperance pamphlet or a cartoon about bootlegging, and asks you to identify the reform impulse behind it or the consequences of Prohibition. No released FRQ has used the term verbatim, but it's a workhorse piece of evidence for LEQs and DBQs about Progressive reform, the expansion of federal power, or continuity in debates over government regulation of morality. The strongest move is pairing the amendment with its repeal. Saying "the Eighteenth Amendment expanded federal power to enforce moral reform, and the 21st Amendment's repeal in 1933 showed the limits of that approach" gives you cause, effect, and change over time in one sentence.
The Eighteenth Amendment is the constitutional ban itself; the Volstead Act is the federal statute Congress passed to enforce it, defining what counted as an "intoxicating liquor" and setting penalties. Think of the amendment as the rule and the Volstead Act as the rulebook with the details. On the exam, enforcement failures belong to the Volstead Act, while the broader policy of Prohibition belongs to the amendment.
The Eighteenth Amendment, ratified in 1919, banned the manufacture, sale, and transportation of alcohol, but it never banned drinking it.
It was the peak of Progressive Era moral reform, driven by the temperance movement's belief that alcohol caused crime, poverty, and corruption.
Prohibition largely failed in practice, fueling bootlegging, speakeasies, and organized crime instead of eliminating alcohol.
It is the only constitutional amendment ever repealed, undone by the 21st Amendment in 1933.
For Topic 8.14 and APUSH 8.14.A, Prohibition works as early evidence in the long-running debate over whether the federal government should regulate morality and social behavior.
Ratified in 1919, it banned the manufacture, sale, and transportation of intoxicating liquors nationwide, starting national Prohibition in 1920. Congress then passed the Volstead Act to enforce it.
No. It banned making, selling, and transporting alcohol, but possessing and drinking it were never federally outlawed. That loophole helped speakeasies and private stockpiles thrive.
The 18th Amendment (1919) established Prohibition; the 19th Amendment (1920) guaranteed women the right to vote. They're easy to mix up because they're back-to-back Progressive Era amendments pushed by overlapping reform movements.
Enforcement failed, organized crime exploded, and by the Great Depression the government wanted the jobs and tax revenue legal alcohol could provide. The 21st Amendment repealed it in 1933, making it the only amendment ever undone.
Yes. It's core Unit 7 content for Progressive reform and 1920s culture, and it's strong evidence for Topic 8.14 essays about continuing debates over the federal government's role in regulating social and moral issues.