This statement is completely at odds with the available evidence, which clearly establishes a strong causal connection between police & public safety. Where are the fact-checkers? Where is the little disclaimer from Twitter letting people know this claim is disputed?
Here’s a paper showing significant crime declines in Washington, D.C., caused by boosts in police presence: papers.ssrn.com/sol3/papers.cf…

Here’s one showing that boosting patrols in Philadelphia led to an estimated crime drop of 43%—73%: law.upenn.edu/live/files/894…
This paper documents a return of $1.63 on every additional dollar spent on policing in 2010: eml.berkeley.edu/~jmccrary/chal…

This one documents significant crime declines resulting from boosting discretionary stops in crime hotspots in New York: researchgate.net/publication/28…
This paper shows a significant increase in crime resulting from abrupt declines in volume of police activity in five cities (declines driven by pattern and practice investigations initiated by the federal government): nber.org/papers/w27324
This paper finds that police in New York City prevented more than 60,000 violent crimes between 1989-1998: media4.manhattan-institute.org/pdf/cr_22.pdf

This study establishes a strong causal connection between police response times and clearance rates in Manchester, England: restud.com/wp-content/upl…
This study documents a strong effect of police on a host of crimes like robbery, auto theft, and murder: princeton.edu/~smello/papers…

And this one documents significant crime declines caused by surfers in police in high crime neighborhoods in New York: journals.plos.org/plosone/articl…
I could go on, and on, but you get the idea. To claim that police have no effect on crime can really only be the product of two things: ignorance or deviousness.
/end rant/
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