I'm not by any means an expert, but the very first Google hit (wikipedia as usual) gives: > Based on Neolithic and Bronze Age data, the total life expectancy a

I'm not by any means an expert, but the very first Google hit (wikipedia as usual) gives: > Based on Neolithic and Bronze Age data, the total life expectancy at 15 would not exceed 34 years. https://en.wikipedia.org/wiki/Life_expectancy https://en.wikipedia.org/wiki/Life_expectancy Which in turn cites this article: https://onlinelibrary.wiley.com/doi/abs/10.1002/ajpa.1330300314 https://onlinelibrary.wiley.com/doi/abs/10.1002/ajpa.1330300...