We all, er, know that guns don't kill people (even though that is what they're designed to do).
But what I didn't know was that guns really didn't kill people until just a few decades ago.
As recently as 1960, just 20 percent of NYC homicides involved a gun! That went up to 48 percent in 1970 and 69 percent in 1990. And I think it's remained at about two-thirds ever since.
The jump from 1960 to 1970 is amazing. Remember, this isn't the crime rate or the number of homicides but the percent of homicides using a gun. What happened? How and why did guns suddenly spread to the criminal class?
(And feel free to applaud me for an all-too-rare use of full-and-honest scaling on the y-axis... you know want to.)