IT IS COMMON enough for new technology to spark a moral panic: think of the Victorians who thought the telegraph would lead to social isolation or Socrates, who worried that writing would erode brain power. But it is unusual for the innovators themselves to be the ones panicking. And it is more peculiar still for those same anguished inventors to be pressing ahead despite their misgivings. Yet that, more or less, is what is happening with the tech world’s pursuit of artificial general intelligence (AGI), meaning an AI capable enough to replace more or less anyone with a desk job, or even superintelligence, meaning an AI so smart no human can understand it.