There have always been outsiders who criticized the tech industry — even if their concerns have been drowned out by the oohs and aahs of consumers, investors, and journalists. But today, the most dire warnings are coming from the heart of Silicon Valley itself. The man who oversaw the creation of the original iPhone believes the device he helped build is too addictive. The inventor of the World Wide Web fears his creation is being “weaponized.” Even Sean Parker, Facebook’s first president, has blasted social media as a dangerous form of psychological manipulation. “God only knows what it’s doing to our children’s brains,” he lamented recently.