Armed bystanders effectively prevent gun deaths.
Empirical studies consistently find that defensive gun use is relatively rare and that laws intended to expand armed self-defense (such as Stand Your Ground policies) are associated with increases in overall homicides and firearm fatalities rather than a reduction in gun deaths.
The provided literature evaluates defensive gun use and self-defense laws directly bearing on the claim that armed bystanders effectively prevent gun deaths. Paper [0] highlights the rarity of defensive gun use in contrast to widespread gun violence exposure, while Paper [4] shows that laws facilitating armed self-defense are linked to increases in homicides rather than a protective reduction in deaths. None of the provided papers support the claim that armed bystanders effectively prevent gun deaths.
Michael D Anestis, Kimberly Burke, Sultan Altikriti, Daniel Semenza. Lifetime and Past-Year Defensive Gun Use.. 2025. https://doi.org/10.1001/jamanetworkopen.2025.0807
Paper [0] demonstrates that defensive gun use is rare relative to overall gun violence exposure, challenging the narrative that permissive carrying policies effectively prevent harm.
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David K Humphreys, Antonio Gasparrini, Douglas J Wiebe. Evaluating the Impact of Florida's "Stand Your Ground" Self-defense Law on Homicide and Suicide by Firearm: An Interrupted Time Series Study.. 2017. https://doi.org/10.1001/jamainternmed.2016.6811
Paper [4] finds that the enactment of Florida's 'Stand Your Ground' self-defense law was associated with a significant and sustained increase in homicides and firearm-related homicides rather than a protective effect.
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