In the wake of yet another school shooting–this time, the 27 dead included many young children–I will simply cite some facts posted by Ezra Klein:
Mother Jones has tracked and mapped every shooting spree in the last three decades. “Since 1982, there have been at least 61 mass murders carried out with firearms across the country, with the killings unfolding in 30 states from Massachusetts to Hawaii,” they found. And in most cases, the killers had obtained their weapons legally….
The Harvard Injury Control Research Center assessed the literature on guns and homicide and found that there’s substantial evidence that indicates more guns means more murders. This holds true whether you’re looking at different countries or different states….
Last year, economist Richard Florida dove deep into the correlations between gun deaths and other kinds of social indicators. Some of what he found was, perhaps, unexpected: Higher populations, more stress, more immigrants, and more mental illness were not correlated with more deaths from gun violence. But one thing he found was, perhaps, perfectly predictable: States with tighter gun control laws appear to have fewer gun-related deaths. The disclaimer here is that correlation is not causation. But correlations can be suggestive.