Once upon a time, nobody outside tech circles had heard of Sam Altman. But then his company, OpenAI, launched ChatGPT, and suddenly he was everywhere – touring the world, giving interviews to gushing journalists, granting audiences to awestruck politicians etc. Whiplash-thin, with a charmingly wide-eyed baby face, he instantly became the acceptable face of digital capitalism.

Then the OpenAI board abruptly fired him, apparently on the grounds that he had not been, er, entirely candid with them. When Satya Nadella, Microsoft’s CEO (who had invested $13bn in OpenAI), heard about it, though, he was mightily pissed off. And in no time all, Altman was unsacked and reinstated in the OpenAI driving seat. And the world was transfixed by the drama of it all. Which only goes to show that appearances can be deceptive.

If the world had read Tad Friend’s profile of Altman, which appeared in the New Yorker in 2016, it might have been less overawed. “I have narrow interests in technology,” he told Friend. “I have no patience for things I’m not interested in: parties, most people. When someone examines a photo and says, ‘Oh, he’s feeling this and this and this,’ all these subtle emotions, I look on with alien intrigue.” Altman’s great strengths, concluded Friend, “are clarity of........

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