Public Health Approach to Crime
Suppress current harm while preventing the conditions that reproduce it
- Difficulty
- Expert
- Time to result
- ~ongoing to results
- Steps
- 5
- Confidence
- 97%
Khan explicitly describes crime as a public-health problem with three linked tasks: deal with the existing harm, stop it spreading, and prevent it occurring in the first place. In his account, police arrest offenders, remove weapons, and use intelligence-led stop and search against immediate threats. Prevention runs in parallel through youth clubs, youth workers, mentors, school visits, and people whom young audiences consider credible, including bereaved parents. The proposed mechanism is that enforcement reduces present danger while sustained support changes the conditions and beliefs that can reproduce violence, such as young people carrying knives because they fear others are armed. Khan repeatedly says that explaining contributing conditions does not excuse criminality. His claims about London outcomes are claims made in the interview and require external data for independent evaluation.
Origin
Extracted from The Diary of a CEO
Core principles
- 01Immediate enforcement and long-term prevention are complementary
- 02Stopping spread matters alongside responding to individual incidents
- 03Credible messengers can change how prevention advice is received
- 04Explaining contributing conditions does not excuse criminal acts
- 05Results require sustained investment and measurement
How to run it
- 1
Contain present harm
Use lawful, proportionate enforcement to protect people from active threats and hold offenders accountable.
Pro tip Define the harm and the enforcement objective before selecting tactics.
Watch out Enforcement without safeguards can damage trust and create additional harm.
- 2
Map how harm spreads
Identify the fears, incentives, group dynamics, and examples that make harmful behavior appear normal or protective.
Pro tip Listen to the people closest to the behavior rather than inferring motives from a distance.
Watch out A plausible pathway is a hypothesis until evidence supports it.
- 3
Interrupt transmission
Challenge beliefs and networks that reproduce the behavior, using messengers the intended audience respects.
Pro tip Match the messenger to the audience and the specific belief being addressed.
Watch out Generic awareness campaigns may not reach people at highest risk.
- 4
Build protective alternatives
Invest in mentors, youth workers, safe activities, employment support, and other relevant alternatives identified by local evidence.
Pro tip Fund continuity because trusted relationships take time to form.
Watch out Do not assume every crime type has the same upstream causes.
- 5
Measure both horizons
Track immediate safety outcomes and longer-term indicators while checking for displacement or unequal impact.
Pro tip Use several measures rather than one headline crime statistic.
Watch out Changes during unusual periods, such as lockdowns, need careful interpretation.
In the wild
Khan describes police removing knives and pursuing intelligence-led stop and search while City Hall funds youth clubs, youth workers, mentors, and school visits. He says some young people carry knives because they fear others do, so prevention includes credible messengers explaining that carrying a knife can make them less safe. He cites reductions in several crime measures, but the episode does not independently test attribution.
→ The example shows immediate enforcement and upstream prevention operating together rather than as substitutes.
Common mistakes
Treating explanation as absolution
Studying contributing conditions does not remove responsibility for criminal conduct or the need to protect victims.
Relying on enforcement alone
Khan's model requires prevention and support alongside the response to current incidents.
Claiming causation too quickly
A falling statistic does not by itself prove which intervention caused the change, especially across a pandemic period.
Is it for you?
Best for
It is best for policymakers and community leaders working on persistent violence with multiple social and enforcement dimensions.
Not ideal for
It is not ideal as a slogan without evidence, accountable policing, specific interventions, or safeguards for civil liberties.
From the transcript
“Think of crime as you would a public health issue.”
“We've got to stop the infection spreading.”
“Stop the infection occurring in the first place.”
From the episode
Sadiq Khan: Why Are Police Officers Attacking Women? How Safe Are We REALLY?