***[Elton] John, who had a notorious drug addiction during the 1970s and 1980s but has been clean and sober for decades, made [the following] statement in [an] interview: John now divides his life into pre- and post-sober periods. … Those struggles have made him doubt the wisdom of legal weed. “I maintain that it’s addictive. It leads to other drugs. And when you’re stoned—and I’ve been stoned—you don’t think normally,” he says. “Legalizing marijuana in America and Canada is one of the greatest mistakes of all time.”John couldn’t be more right.***We’ve long known that marijuana use damages the brain, especially...