Read the "other measures" part of the article. "While the most common age of death in adulthood among modern hunter-gatherers (often taken as a guide to the li

Read the "other measures" part of the article. "While the most common age of death in adulthood among modern hunter-gatherers (often taken as a guide to the likely most favourable Paleolithic demographic experience) is estimated to average 72 years,[169] the number dying at that age is dwarfed by those (over a fifth of all infants) dying in the first year of life, and only around a quarter usually survive to the higher age." Etc.