"Having a gun in the home makes you safer."
The research on this question is extensive and consistent: having a firearm in the home is associated with significantly higher risk of death, not lower. A meta-analysis published in the Annals of Internal Medicine reviewing 16 studies found that access to a firearm in the home is associated with a 2x higher risk of homicide and a 3-4x higher risk of suicide. The increased risk applies to all household members, including children and other family members who were not the gun purchaser.
The most common use of a firearm in the home is not self-defense — it is suicide. Of the roughly 48,000 gun deaths in the United States annually, approximately 55% are suicides. Access to a firearm is the single strongest predictor of suicide completion because firearms have a fatality rate of approximately 85% compared to 1-5% for other common methods. The impulsivity of most suicide attempts means that reducing access to the most lethal method saves lives — 90% of people who survive a suicide attempt do not go on to die by suicide.
Defensive gun uses are real but far rarer than often claimed. The frequently cited figure of '2.5 million defensive gun uses per year' comes from a 1995 survey by Gary Kleck that has been widely criticized for methodological problems including respondent exaggeration and false positives. The National Crime Victimization Survey — a much larger and more rigorous dataset — estimates approximately 60,000-80,000 defensive gun uses per year. Even this number must be weighed against approximately 500 unintentional gun deaths, 20,000+ gun suicides, and 20,000+ gun homicides annually.
Suicide risk: 3-4x higher | Annals of Internal Medicine meta-analysis