" the brain evolved a built-in negativity bias. While this bias emerged in harsh settings very different from our own, it continues to operate inside us today as we drive in traffic, head into a meeting, settle a sibling squabble, try to diet, watch the news, juggle housework, pay bills, or go on a date. Your brain has a hair-trigger readiness to go negative to help you survive. "

― Rick Hanson , Hardwiring Happiness: The New Brain Science of Contentment, Calm, and Confidence