It looked like Barack Obama might do something rash when he travelled to West Point, New York, on Wednesday to deliver the commencement address of the US Military Academy. Foreign policy thinkers in both parties have accused the president of being unwilling to provide US leadership in the world. They urge him to look to his “legacy” and to think big. The New York Times columnist Thomas Friedman recommended the Ukraine crisis as a “legacy opportunity” and even suggested a series of activist steps.

This is, alas, a typically American way of looking at history. The late historian Christopher Lasch marvelled in the early 1990s at the way Bill Clinton arrived in office “already obsessed with his ‘place in the history books’?.?.?.?as if ‘history’ were just a kind of protracted version of the publicity industry, and you could reserve a room just by phoning ahead with a little advance hype”. Mr Obama does not need to bully anyone to secure a “legacy”. Changing US foreign policy after George W Bush’s two terms is the main thing he was elected to do. He has done it.

Mr Obama’s problem is different. When he says “America must always lead on the world stage”, there is no reason to doubt his sincerity. But such leadership comes at a price, and he is disinclined to pay it. He proposed bombing Syria at a point last year when Bashar al-Assad was alleged to have used chemical weapons but then abandoned the idea in the face of voter rage. He would rather gain a reputation for indecision than make a blunder. He cited a predecessor, Dwight Eisenhower: “War is mankind’s most tragic and stupid folly; to seek or advise its deliberate provocation is a black crime against all men.” Mr Obama’s feelings on the matter may explain the uncharacteristic gracelessness with which he sometimes criticises Mr Bush.