Paul Helmke, president of the Brady Campaign to Prevent Gun Violence, told a reporter at the National Journal: “This level of carnage is something that the elected officials aren’t going to be able to ignore.”

Mr Helmke’s words sound correct, as the US continues to reel from the murder of 20 six and seven-year-olds in a school in Newtown, Connecticut, in mid-December. Then again, his words also seemed correct when he first uttered them, which was back in April 2007, just after a disturbed undergraduate, Seung-Hui Cho, massacred 32 people on the campus of Virginia Polytechnic University before turning his weapons on himself. Elected officials have proved quite capable of ignoring Cho’s rampage, not to mention several more since then. There is no guarantee the outrage over Newtown will spur them to action, either.

In seeking to prevent the next massacre, it is natural and right to focus on mass gun ownership, American’s modern-day peculiar institution. There may be a quarter of a billion guns in private hands in the US, and yet the government regulates them less stringently than it does foie gras, tobacco or office humour.