An anonymous reader writes: Yuval Noah Harari, author of the international bestseller "Sapiens: A Brief History of Humankind," doesn't have a very optimistic view of the future when it comes to artificial intelligence. He writes about how humans "might end up jobless and aimless, whiling away our days off our nuts and drugs, with VR headsets strapped to our faces," writes The Guardian. "Harari calls it 'the rise of the useless class' and ranks it as one of the most dire threats of the 21st century. As artificial intelligence gets smarter, more humans are pushed out of the job market. No one knows what to study at college, because no one knows what skills learned at 20 will be relevant at 40. Before you know it, billions of people are useless, not through chance but by definition." He likens his predictions, which have been been forecasted by others for at least 200 years, to the boy who cried wolf, saying, "But in the original story of the boy who cried wolf, in the end, the wolf actually comes, and I think that is true this time." Harari says there are two kinds of ability that make humans useful: physical ones and cognitive ones. He says humans have been largely safe in their work when it comes to cognitive powers. But with AI's now beginning to outperform humans in this field, Harari says, that even though new types of jobs will emerge, we cannot be sure that humans will do them better than AIs, computers and robots.