Outrage has become the signature emotion of American public life.

People are so used to it – the noise, the flying spittle – that they were pleasantly surprised when Rep.-elect Dan Crenshaw of Texas declined to be incensed. He is the former Navy SEAL who lost an eye in Afghanistan and was mocked – more stupidly than viciously – for his eyepatch by a performer on “Saturday Night Live.” The insult called for outrage, in the usual tit-for-tat. But instead Mr. Crenshaw took it in good humor. He went on “SNL” to accept the performer’s apology. Not everything needs to be treated as an outrage, he said – a grown-up in a moment of grace.

People have been mad as hell for much of the 21st century, starting roughly with the stalemated Bush-Gore election in 2000, followed quickly by 9/11. Fundamentals have been changing fundamentally: marriage, sexual identity, racial politics, geopolitics. Outrage flourishes also because of the rise of social media – the endless electronic brawl – and because it plays so well on our screens. Cable news draws pictures in crayon, in bold primary colors that turn politics into cartoons. On the left, “stay woke” means “stay outraged.” Trumpians want to “lock her up” or “build a wall.” Outrage is reductive, easy to understand. It is an idiom of childhood – a throwback even to the terrible twos.

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