Employment , access to healthcare , and education are all closely linked to longer lifespans . `` The first eight presidents lived an average of 79.8 years during a time when life expectancy for men was under 40 , '' says Olshansky , whose findings were published today in the Journal of the American Medical Association . Researcher estimates the birth , death , and retirement years of every American president . Two - thirds of presidents live ( or are living ) longer than their projected lifespans .
Employment , access to healthcare , and education are all closely linked to longer lifespans . Researcher estimates the birth , death , and retirement years of every American president . Two - thirds of presidents live ( or are living ) longer than their projected lifespans .