This article was featured in One Story to Read Today, a newsletter in which our editors recommend a single must-read from The Atlantic, Monday through Friday. Sign up for it here. This article contains spoilers for the film Barbie. Earlier this week, Elon Musk announced that he would be rebranding his social-media platform: Twitter is now, simply, X. Speculation abounded as to why Musk would trade a well-known brand for a letter typically associated with rejection and porn: spite, maybe. Or maybe—the most absurd theory, and therefore the most likely—the man who had named his car models “S,” “3,” “X,” and “Y” was doing it, once again, for the lols. Soon after Twitter became X, employees reported, the conference rooms of its headquarters were rechristened. The staffers Musk hasn’t yet fired can now plan the future of democratized conversation from a meeting room named “s3Xy.” X was released, as it happened, the same weekend that the Barbie movie was. The coincidence was eloquent. Barbie is a film about its namesake, definitely, and an exploration of …