As investor enthusiasm for artificial intelligence, and lately for a Trump Presidency, has been driving the stock market to record highs this year, Jeremy Grantham has been having flashbacks. At the end of the nineteen-nineties, the veteran value investor--one that looks for undervalued stocks--shied away from soaring Internet and technology stocks, believing that their prices had departed from financial reality, and that the market was heading for a crash. Far from thanking him for sounding the alarm, many clients of G.M.O., a Boston-based investment-management firm that Grantham had co-founded, held it responsible for making them miss out on a vertiginous rise in the Nasdaq, which went up by about a hundred and sixty per cent between 1998 and 1999. Some withdrew their money from the company. "We started off in a good position, and in two years we lost almost half of our business," Grantham recalled.

Business sectors ranging from agriculture and manufacturing to automotive and financial services are increasingly turning to artificial intelligence as a means to automate large swaths of their organizations--and, along the way, save enormous sums through improved efficiencies. But, says'Megathreats' Author and NYU Stern School of Business professor Nouriel Roubini, the rise of AI will also have a massively negative impact on workers throughout the economy. AI has helped revolutionize everything from the smartphones in our pockets to our grocery stores, which use the technology to better predict which items customers want to see on shelves. However, Roubini, whose prediction of the 2008 financial crisis earned him the moniker "Dr. Doom," says AI poses a threat to millions of workers.