There are no magic potions on offer here, but many of the findings are provocative. The best childhood predictor of longevity, it turns out, is a quality best defined as conscientiousness: “the often complex pattern of persistence, prudence, hard work, close involvement with friends and communities” that produces a well-organized person who is “somewhat obsessive and not at all carefree.”
Some of the findings in “The Longevity Project” are surprising, others are troubling. Cheerful children, alas, turned out to be shorter-lived than their more sober classmates. The early death of a parent had no measurable effect on children’s life spans or mortality risk, but the long-term health effects of broken families were often devastating. Parental divorce during childhood emerged as the single strongest predictor of early death in adulthood. The grown children of divorced parents died almost five years earlier, on average, than children from intact families.