The futurist philosopher Yuval Noah Harari worries about a lot.

He worries that Silicon Valley is undermining democracy and ushering in a dystopian hellscape in which voting is obsolete.

He worries that by creating powerful influence machines to control billions of minds, the big tech companies are destroying the idea of a sovereign individual with free will.

He worries that because the technological revolution’s work requires so few laborers, Silicon Valley is creating a tiny ruling class and a teeming, furious “useless class.”

But lately, Mr. Harari is anxious about something much more personal. If this is his harrowing warning, then why do Silicon Valley C.E.O.s love him so?

“One possibility is that my message is not threatening to them, and so they embrace it?” a puzzled Mr. Harari said one afternoon in October. “For me, that’s more worrying. Maybe I’m missing something?” ...