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I really wish people would stop comparing our current 100-year lifespan with pre-historic humans where someone my age (31 years old) would have been considered an elder (if even still alive!).

"Fake" meat tastes and looks like the real thing, but it has none of its downsides (look up "Forks over Knives" for some decent documentary on that. take with a grain of salt).



Wrong. You are simply misinformed. Infant mortality skews the average lifespan severely. Take out infant mortality and people lived long and robust lives, without the help of modern medicine.


According to Wikipedia (http://en.wikipedia.org/wiki/Life_expectancy) which pulls its source for "Life expectancy variation over time" from Encyclopædia Britannica and other sources, life expectancy in the Neolithic was about 20 years old. And that does account for infant mortality, but not pre-natal mortality. Do you have a source for "long and robust lives"?


> And that does account for infant mortality

Though it doesn't account for general childhood mortality or death during childbirth, both of which were pretty big factors.


Here you go, should whet your appetite:

http://www.ncbi.nlm.nih.gov/pubmed/11817904


So you're suggesting we compare how old people live by ignoring all those people that died? In 500 years if the average life-span is 200 years will we ignore the people that died during this era in their 70's?


So on one hand you are saying that a pre-historic diet leads to an early death, but you also want to count deaths that have nothing to do with said diet? Not so fast.

Infant mortality has everything to do with medical care and very little to do with the diet. That's why infant deaths should be thrown out when talking about the diet.

If I have 3 people, one died at age 0, one died at age 50 and one died at age 60, the average lifespan is about 36.5. Clearly misleading. I don't think people realize just how high infant mortality was prior to the advent of modern medicine.


I think you missed the point of the previous commenter.

If you have 5 people who are born on the same day, 4 of which live till 80, 1 of which dies shortly after birth, the average lifespan will be 64 even though 80% of the people lived until 80.

His point was that most of our increase in average lifespan can be attributed to the reduction in infant mortality rather than people living to higher ages.


no, it's a common misunderstanding of the lifespan metric. mberning is pointing out that the 'maximum' lifespan hasn't really changed. The change has primarily come from infant mortality so one possibility is once infant mortality is eliminated we would no longer see gains in life span.


I don't think that maximum human lifespan has increased as significantly as it seems, but rather infant mortality rates have shrunk so much that our 'average life expectancy' has increased dramatically.




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