How early, exactly? Several studies have found hatred of outsiders kicks in around age six, while others report it can be traced all the way back to infancy. Research published earlier this year found nine-month-old infants associated happy music with faces of their own race, and sad music with faces of people from other races.

So while our affection for "us" is innate, it's just possible that our suspicion and hatred of "them" is learned behavior—and thus can be unlearned.

讀完:August 25, 2017 at 04:04PM|來源: