I think that Elon Musk is an object lesson in moral philosophy.
Like, he's the epitome of self-interest; the closest thing real life can produce to a Randian hero. And by any reasonable standard, he's won at life! He's the richest man ever to live, and he's getting richer; he controls the channels of information and communication; the government of what remains the world's only superpower waits on his command. If capitalism had a victory condition, he would surely have achieved it. And yet...
He's empty. He's an absolute sucking void of neediness. His own children hate his guts. He pays professional gamers to run up impossibly high scores in every game under the sun because the pale glow of being praised by epic bacon chuds online is the closest thing that he can feel to love.
Like. I can't tell you what a soul is, but I think you neglect it at your peril.