KS3 · History
Public health and Victorian reform
In 1858 the smell of the river was so bad it disrupted Parliament. It achieved what a doctor's careful evidence could not.
Why were industrial cities so deadly?
Tap each box to see how it led to disease.
Tap a cause to see what it triggered.
History · Cause & effect
From the Broad Street pump to the sewers
Tap an event to see what led to it and what came next.
Causes ←
What led here
Event
Parliament shrugs
1855
It was not until the 1880s that cholera was proved to be caused by bacteria. Without that evidence in the 1850s, it was easier to ignore Snow.→ Consequences
What followed
WHAT YOU'VE LEARNED
A quick recap of today's lesson.
A brave doctor, a government that wouldn't listen, and a very smelly river
What you need to know
- Public health means the actions and systems that prevent disease and keep communities healthy.
- Between 1801 and 1851 industrial towns grew fast, crowding workers into slums and back-to-backs with poor ventilation and lighting.
- Many workers' areas had no rubbish collection, sewers, toilets or running water, so cholera and typhoid spread.
- Laissez-faire is the belief that governments should not interfere in daily life, so most authorities left wellbeing to individuals.
Have a goYour friend Dev says: 'Laissez-faire means the government rushes in and sorts everything out.' Gently tell Dev what's wrong.
It means the opposite: governments should not interfere, and people manage their own wellbeing.
Dev has flipped it. The belief was that individuals, not the government, were responsible for their own wellbeing.
- Most people blamed cholera on miasma, or bad air, so cleaning streets and burning tar targeted the wrong thing.
- John Snow doubted miasma because cholera hit the gut, not the lungs. His Soho map clustered deaths around the Broad Street pump.
Have a goSnow marks every cholera death on a street map and most of the spots bunch up around one pump. What do you think he suspects?
Something about the water from that pump.
Deaths piling up around one shared pump point to something those people had in common, not to bad air spread over the whole area.
- In 1855 Parliament largely ignored Snow. The Great Stink of 1858 is what triggered the approval of Bazalgette's sewers.
- The 1848 Public Health Act was permissive, so many councils did nothing. The 1875 Act was compulsory.
Have a goIn 1850 a council is told it can improve its sewers but doesn't have to, and the work will cost money. What is it likely to do?
Quite possibly nothing, as many councils did.
A permissive law lets councils choose, and 'many did not' reform, which is why the 1848 Act's impact was relatively limited.
- Historians highlight three factors behind greater government action: individuals, scientific knowledge and politics.
- In 1867 the number of voters doubled, giving many industrial workers the vote. The 1875 Act came less than ten years later.
The big picture
Industrial cities were crowded, had no proper sewers or clean water, and were run by a government that left people to look after themselves. John Snow showed cholera spread through contaminated water, but Parliament ignored him until the Great Stink of 1858. Historians point to three factors behind greater government action: individuals, scientific knowledge and politics.
Key points
Worked example
Problem
Which mattered more in getting London's sewers approved: John Snow's evidence or the Great Stink? Build a short judgement.
⚠ Watch out
Thinking John Snow alone changed everything. His findings were largely ignored in 1855, the Great Stink of 1858 triggered the sewers, and historians also point to scientific knowledge and politics. Another slip is saying the pump handle ended the outbreak: deaths around Broad Street fell away.
Memory hook
Individuals ask, science explains, politics acts. And in 1858 a smell did the persuading.
Check yourself
Look back at your verdict from the first activity. Pick one piece of evidence that challenges the claim, and say if it points to science, politics or a crisis.
Flashcards
(13)What is public health?
What is laissez-faire?
What were back-to-backs?
What does it mean if food was adulterated?
What is an epidemic?
What was miasma?
What did Louis Pasteur publish in 1861?
Why did Snow doubt miasma?
What did Edwin Chadwick do?
What is a permissive law?
What is a compulsory law?
What was the Great Stink of 1858?
Which idea did Henry Charlton Bastian support instead of germ theory?
Tap any card to flip it, or use Study as deck to go through them one at a time. In the full lesson these run as a spaced-repetition deck — you rate each card Hard, Good or Easy and the tricky ones keep coming back until they stick.
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How this lesson was checked. This KS3 Historylesson was published through Lightbulb Learning's human-designed editorial process — the educational standards, accuracy rules and publication checks it must pass were authored and approved by Philip Halpin. It passed subject-specific assessment, automated educational checks and technical publication verification before going live (publication checks completed 9 October 2026). Published pages are monitored, human spot-checking is ongoing across the lesson library, and anything found wrong is corrected or withdrawn. How our lessons are made and checked. Spotted a mistake? Email hello@lightbulblearning.co and we'll review it.