The evidence from many population-based studies of guns and suicide is as strong as that from individual-level studies. Across U.S. cities, states, and regions, higher levels of household gun ownership are associated with higher rates of firearm-related and overall suicide. There is no association between gun ownership levels and suicide by means other than guns. These studies have controlled for such factors as rates of urbanization, poverty, education, alcohol use, unemployment, divorce, depression, suicidal ideation, and suicide attempts. The association holds for men, women, adolescents, and all adult age groups (5). The effect of a gun in the home is not only significant but important. Indeed, differences in suicide rates among the states are better explained by household gun ownership levels than by levels of mental health problems, suicidal ideation, or suicide attempts (6). Studies also show that adults in households with firearms are no more depressed or suicidal than those in households without firearms (7), yet they are far more likely to die of suicide.