The 2013 study looked at murder rates from places that had banned guns around the world, from Washington, D.C. and Chicago to England, Wales, Jamaica and even the Solomon Islands, an archipelago in the South Pacific which only had mass shootings after they decided to ban guns.

The most striking example might be that of England and Wales, both of which banned firearms back in 1997. Homicides rose from 676 to 734 the first year of the ban. And things only got worse from there.

“After the ban, clearly homicide rates bounce around over time, but there is only one year (2010) where the homicide rate is lower than it was in 1996,” the CPRC noted. “The immediate effect was about a 50 percent increase in homicide rates. Firearm homicide rate had almost doubled between 1996 and 2002 … The homicide and firearm homicide rates only began falling when there was a large increase in the number of police officers during 2003 and 2004. Despite the huge increase in the number of police, the murder rate still remained slightly higher than the immediate pre-ban rate.”

Meanwhile, Jamaica’s murder rate was at roughly 10 killings per 100,000 people in 1974, when guns were banned. By 1980, that number spiked to over 40 per 100,000, and 58 per 100,000 in 2005. While the numbers have again bounced around, Jamaica didn’t see under 20 murders per 100,000 people between 1990 and 2007. According to the Jamaica Gleaner, 38 people were murdered in the first six days of this year alone.

Ireland also saw a spike when it banned guns, the CPRC reports, from under 0.4 murders per 100,000 in 1972 to over 1.6 per 100,000 in just a few years, an increase of well over 400 percent. While that was the peak of the murder rate, it never fell below what it was the year before the gun ban.

Chicago also banned guns in 1982. How did that work? Well, the Windy City has always had a high homicide rate, but as you can see, it rose dramatically in the years following the ban. While there was a reduction in the 2000s, it rebounded again in the 2010s to become the gunshot capital of America.

Washington, D.C., meanwhile, banned handguns in 1976. That year, there were 188 murders in the nation’s capital. In the first decade of the ban, only three years saw lower murder totals. Then, in 1988, murder began to explode in the city, with 369 murders. The next year, it was 434. D.C. wouldn’t see a year with fewer murders than that until 1994, when the city recorded 399 murders. – READ MORE