The Longevity Project summarizes research that followed the lives of precociously intelligent children into old age. The findings support the idea that a strict and conscientious lifestyle help one to live longer. “The benefits of a conscientious personality are obvious: These people are less likely to smoke and drink, or drive dangerously. Throughout life, conscientious people are less impulsive, and less depressed. The researchers found that the prudent died less from all causes, not just those related to dangerous habits.”