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Since the late 1970's, the National Rifle Association and other firearm advocates have successfully fought to make armed self defense increasingly acceptable in everyday life. A wealth of survey data—the most recent of which came via a major Pew poll released last month—shows that Americans have grown more comfortable with the toting of concealed guns in public. Self defense is now the most common reason cited for owning a firearm, leading handguns to become the most popular kind of weapon in the American arsenal. Those attitudes and behaviors mark major shifts: In the mid 1990s, Americans primarily owned guns for recreation, and as recently as 2005, a strong plurality thought only police officers should carry guns in public.

At the heart of this campaign for the hearts, minds, and holsters of America has been an article of faith that the NRA and its allies have preached since at least the 1990s: that people enhance public safety by carrying guns to defend themselves. Economist John Lott first developed this "More Guns, Less Crime" theory in his 1998 book of the same title, and has since popularized it via frequent legislative testimony and op-eds.

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In a new working paper published on June 21 by the National Bureau of Economic Research, academics at Stanford Law School ran that data through four different statistical models—including one developed by Lott for More Guns, Less Crime—and came back with an unambiguous conclusion: states that made it easier for their citizens to go armed in public had higher levels of non-fatal violent crime than those states that restricted the right to carry. The exception was the narrower category of murder; there, the researchers determined that any effect on homicide rates by expanded gun-carry policies is statistically insignificant.

https://www.vice.com/en_us/article/e...heory-debunked