Donald Trump Promised a Softer Image. He Delivered Hulkamania.

The last night of the Republican National Convention featured glimpses of a more sober tone — and a whole lot of testosterone.

Who is Donald J. Trump?

After over four decades of tabloid celebrity, reality-TV stardom and presidential politics, you would think this would be a settled question. But after his near assassination in Pennsylvania, the Republican National Convention teased that the former president was going to unveil a softer, changed version of himself. He would recast his acceptance speech to emphasize “unity,” a word that, in four days of TV coverage, was endlessly parroted and rarely defined.

Mr. Trump turned himself into his own surprise guest. Would the final night of the convention portray him as a bellicose, combative alpha male, or as a sensitive late convert to empathy and self-reflection?

The answer was: Yes, and yes. The night began with a pageant of hypermasculinity, with musclemen and ripped garments. It led to Mr. Trump’s taking the stage with a new, somber voice as he recounted his brush with death. Then, over the course of a digressive hour-and-a-half speech, he somehow changed back before our eyes.

First came The Man Show. The introductory hours of the night featured a rotation of admirers, heavily male, who cited Mr. Trump’s close call and defiant survival as testimony to his macho fighting spirit.

This is what male identity politics looks like. Tucker Carlson, the former Fox News personality — who has embraced the alt-right angst over testosterone levels — spoke off the cuff, suggesting that the shooting established Mr. Trump as a leader on a biological level. “A leader is the bravest man,” Mr. Carlson said. “This is a law of nature.” Kid Rock retooled his rap-metal anthem “American Bad Ass,” exhorting the delegates to throw up their fists and “Say fight! Fight! Say Trump! Trump!” Dana White, the beefy chief executive of the Ultimate Fighting Championship, introduced Mr. Trump.