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Law enforcement doesn’t prevent crime (and there is no legal expectation for them to do so). They disincentives crime by seeking to punish those who previously committed a crimes, and they disincentivize vigilante justice by offering a (ideally) non-emotional legal system alternative to retribution.

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Technically this is talking about “private security” rather than “law enforcement. The primary goal of private security is typically the security of their clients, not enforcing the law. The article in particular talks about private security preventing crime by addressing root cause (e.g. helping those in need).

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