Just after 7 a.m. on Saturday, Nov. 18, as the sun was rising in the Gulf of Mexico, Noel Rangel, a 26-year-old native of Brownsville, Texas, was brought unwillingly into wakefulness by an uninvited sensation: The richest man in the world was shaking him. Or rather, his entire apartment. His bed was rumbling, his windows rattling. “I could hear the glass,” he said. He was confused. He woke as if Elon Musk himself had grabbed him by the shoulders.

Americans as a whole have become more familiar with the tax that powerful and erratic figures levy on people’s emotional and mental well-being. Though many very rich men fantasize about disconnecting from other humans — to go to space, or, in the case of the tech billionaire Peter Thiel, to create artificial cities in international waters — they are more desperate for social validation, not less. They need to inspire love or fear or awe.

Many people suspect that Donald Trump — though he denies it — ran for president in part because he was tired of being mocked so often. Jeff Bezos spent $42 million to build a mechanical clock under a West Texas mountain that is intended to last 10,000 years. Mr. Musk spent $44 billion of mostly other people’s money to buy Twitter, rebrand it to X and guarantee that he could continue to irritate people on a global scale.

For Mr. Rangel, what was figurative for others had become literal: When a tycoon stomps, the earth shakes. Mr. Musk’s company SpaceX had launched a new iteration of its Starship rocket about 25 miles away. That one didn’t blow up over his city as previous launches had. But Mr. Rangel still couldn’t go back to sleep. Across social media, some residents shared his irritation at being roused by a launch they did not realize was coming.

Their irritation was perhaps surprising. Brownsville has become something of a company town for SpaceX, its largest private employer, and the most high-profile firm in the commercial space industry right now. Its more than 13,000 employees build rockets, launch NASA astronauts on their journeys to the International Space Station, provide broadband internet via satellite and are working toward an ambitious goal to send people to Mars one day.

Murals glorifying the company dot Brownsville’s downtown, which has been spruced up with donations from Mr. Musk. Businesses have reoriented to serve space tourists who flock from all over the world to see his rockets up close. To some, Mr. Musk has given Brownsville, a particularly poor city of about 200,000 in a neglected part of Texas, a reason for being, a future. To others, he’s a colonizer, flirting with white nationalists online while exploiting a predominantly brown work force in one of Texas’s fringes.