An American Export

Iain Overton (author of The way of the Gun: A Bloody Journey into the World of Firearms, explains some of the global implications of America's gun culture:

The right to bear arms, and the sheer number of firearms bought and sold in this country every year as a result, has undeniable global implications. For a start, Americans in effect support the world's gun economy. In addition to the 8.6 million guns made in the U.S. in 2012, 4.8 million more were imported from overseas. The U.S. import volume of foreign guns more than tripled between 2003 and 2012.

More insidious, though, is how the licit American gun industry affects the illicit Latin American gun market. The ease with which guns can be purchased in the U.S., and the fact that many sales may be conducted without background checks, has deep consequences. The majority of guns found in Mexico and Central America are from the United States. It is estimated that more than 250,000 guns flow south of the border into Mexico — a country with just one official gun retailer — every year. Roughly 45% of U.S. firearms licensees are believed to rely on Mexican trade for their survival. To the north, Canada estimates that 50% of the guns used in crime in Ottawa were smuggled across the border.

In 2014, El Salvador had almost 4,000 killings, a rate of about 62 homicides per 100,000 (in the U.S. it is about 4 per 100,000). Most of these slayings were committed with guns — and about 50% of guns traced in El Salvador that year came from the United States. The lifting of the Federal Assault Weapons Ban in the U.S. in 2004 resulted in more than 2,600 estimated additional homicides in Mexico.