Science

Kawachi points out that it is impossible to prove whether one factor caused the other, but the most reasonable interpretation is that people who don’t trust their neighbors are more likely to think guns will provide security. In this way the number of guns and the number of homicides both stem from the same root, suggesting that guns don’t cause murders anymore than cars cause fatal accidents. This was also the conclusion of a policy paperconducted by the London-basedCentre for Economic Policy Research in 2005 that found no support for the argument that more guns cause more homicides. “The appearance of such an effect in past research,” wrote the authors, “appears to be the product of methodological flaws.” 

What they said it is more than one factor, and controlling guns will not control violence