To absorb the scale of the mayhem, it’s worth trying to guess the death toll of all the wars in American history since the War of Independence began in 1775, and follow that by estimating the number killed by firearms in the US since the day that Robert F. Kennedy was shot in 1968 by a .22 Iver-Johnson handgun, wielded by Sirhan Sirhan. The figures from Congressional Research Service, plus recent statistics from icasualties.org, tell us that from the first casualties in the battle of Lexington to recent operations in Afghanistan, the toll is 1,171,177. By contrast, the number killed by firearms, including suicides, since 1968, according to the Centres for Disease Control and Prevention and the FBI, is 1,384,171.

That 212,994 more Americans lost their lives from firearms in the last 45 years than in all wars involving the US is a staggering fact, particularly when you place it in the context of the safety-conscious, “secondary smoke” obsessions that characterise so much of American life…

Talking to American friends, I always sense a kind of despair that the gun lobby is too powerful to challenge and that nothing will ever change. The same resignation was evident in President Obama’s rather lifeless reaction to the Washington shooting last week. There is absolutely nothing he can do, which underscores the fact that America is in a jam and that international pressure may be one way of reducing the slaughter over the next generation. This has reached the point where it has ceased to be a domestic issue. The world cannot stand idly by.