This is an incorrect generalization from average life expectancies that include incredibly high infant/childhood mortality. The life expectancy cited by Wikipe

This is an incorrect generalization from average life expectancies that include incredibly high infant/childhood mortality. The life expectancy cited by Wikipedia for the paleolithic is around 39 additional years for those surviving to 15. https://en.wikipedia.org/wiki/Life_expectancy https://en.wikipedia.org/wiki/Life_expectancy