The lose-your-teeth thing seems to be more of a problem for poor farmer societies. IIRC skeletons of earlier foragers mostly had good teeth. On lifespans, expe

The lose-your-teeth thing seems to be more of a problem for poor farmer societies. IIRC skeletons of earlier foragers mostly had good teeth. On lifespans, expectation at birth was very different from expectation for a young adult. (The latter was still much less than now, yes.) Similarly I think we need to know more about the distribution of good years and bad years -- when your numbers are limited by famine, which you can't really store up for, it's not strange for the good years to be relatively light on the day-to-day work needed. If this long article mentions this, I missed it in my skim.