Prohibition

HistoryAQAGCSEUnit: America 1920-1973
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The basics

Setting the Scene

📖 Setting the Scene

On January 17, 1920, America attempted one of history's boldest social experiments: banning alcohol. The 18th Amendment made it illegal to manufacture, sell, or transport "intoxicating liquors." Supporters called it the "Noble Experiment" and genuinely believed it would transform America — ending poverty, domestic violence, and moral decay. What actually happened was the opposite of everything they intended. Americans didn't stop drinking — they just started drinking illegally. This single decision created organised crime on an industrial scale, corrupted police forces and politicians across the country, and taught millions of ordinary Americans that breaking the law was acceptable, even fashionable. By the time Prohibition was repealed in 1933, it had become the only Constitutional Amendment ever to be undone — a testament to its spectacular failure.

Prohibition - OverSimplified (33 mins) — One of their best!

What was a "speakeasy"?: A secret illegal bar — needed password to enter, bribed police to stay open
Key terms

History glossary

What was a "speakeasy"?
A secret illegal bar — needed password to enter, bribed police to stay open
What was "bootlegging"?
Making, smuggling, or selling illegal alcohol
Spotlight
How to THINK About This Topic (History Skills)

Prohibition is a perfect topic for showing you understand unintended consequences — when actions produce the opposite of their intended results. This is a key concept in History.

Exam tip

Earn the mark scheme marks

🧠 Memory Aid: Prohibition

The "NOBLE experiment — NASTY results" framework:

  • N — Noble intention (reduce poverty, crime, immorality)
  • O — Organised crime created (Capone, $60m/year, gang wars)
  • B — Bootlegging industry ($2 billion illegal economy)
  • L — Law-breaking became normal (30,000 speakeasies in NYC)
  • E — Enforcement impossible (only 1,500 agents; 1 in 12 corrupt)

Key statistics to know cold:

  • 30,000 — speakeasies in New York City alone
  • $60 million — Al Capone's annual income from bootlegging
  • 1,500 — Prohibition agents for the entire country (hopelessly inadequate)
  • 1 in 12 — agents fired for corruption
  • 227 — gangland murders in Chicago 1927-30 (0 convictions)
  • 1933 — 21st Amendment repeals Prohibition — the only amendment ever undone

The "only Amendment ever repealed" fact: This is your single strongest piece of evidence that Prohibition failed. The US Constitution has been amended 27 times. Only ONCE has an amendment been undone — the 18th Amendment. America officially admitted it had made a mistake. Always use this in your conclusion.

The Capone quote: "Prohibition is a business. All I do is supply a public demand." — This quote is perfect for exam answers because it comes directly from the man who most benefited from Prohibition. It shows that Capone understood exactly why Prohibition failed: it created a business opportunity by banning something people still wanted.

Now try it yourself

Quiz · Question 1 of 12

Which Amendment to the US Constitution introduced Prohibition in January 1920?

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