Psilocybin—a notorious hallucinogen found in “ magic mushrooms ”—is a federally controlled substance that the U.S. deems to have “no currently accepted medical use” and “a high potential for abuse.” But not everyone agrees with that assessment: New Zealand on Wednesday became the latest country to approve the use of the substance for therapeutic purposes. David Seymour, New Zealand’s Associate Minister for Health, told reporters that the new policy , which allows a single approved psychiatrist