No sitting American president had ever delivered indictments of this kind while abroad, or for that matter at home, or been so ostentatiously modest about the character and accomplishment of the nation he led. He was mediator, an agent of change, a judge, apportioning blame — and he was above the battle.

None of this display during Mr. Obama’s recent travels could have come as a surprise to legions of his supporters, nor would many of them be daunted by their new president’s preoccupation with our moral failures. Five decades of teaching in colleges and universities across the land, portraying the U.S. as a power mainly responsible for injustice and evil, whose military might was ever a danger to the world — a nation built on the fruits of greed, rapacity and racism — have had their effect. The products of this education find nothing strange in a president quick to focus on the theme of American moral failure. He may not share many of their views, but there is, nonetheless, much that they find familiar about him.