pmc.ncbi.nlm.nih.gov/articles/PMC2625386/

sc.edu/…/conversation-old-age-is-not-a-modern-phe…

sapiens.org/…/life-expectancy-measure-mispercepti…

Logically, average life expectancy cannot be higher than average lifespan. For that to be true would mean that more people who made it out of childhood lived past their expected lifespan than didn’t, which doesn’t make sense.

If the expected lifespan is 38, than the average life expectancy before medical science advanced to the point where we could extend it should be lower than 38, but we in fact know that more often than not if you made it out of childhood in the past your chances of making it to 50+ were good, barring disease, war or what have you.