…according to an article at US News-Money. Unfortunately, conscientiousness is personality trait that likely has a strong hereditary component. The article quotes the authors of “The Longevity Project”:
“It was not cheerfulness and it was not having a sociable personality that predicted long life across the many ensuing decades,” she and Friedman wrote in their book. “Certain other factors were also relevant, but the prudent, dependable children lived the longest. The strength of this finding was unexpected, but it proved to be a very important and enduring one.”
The authors discount the role of modern medical technology.