AI risk activists protest near Downing Street in London, England, on on September 16, 2026. | Dan Kitwood/Getty Images Is AI going to kill us all?  In Silicon Valley, it’s not such a novel question. But after Anthropic employee Jacob Coxon quit his job last week and posted on X that AI “could kill us all by the end of the decade,” a lot more people are asking.  “This is not a marketing stunt,” Coxon wrote. “If anything, many executives and senior researchers will couch their phrasing in the press to sound sensible – but I hear the same people express fear privately. No other human ac...