Even before modern medicine our life spans were an anomaly in the animal kingdom
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Prior to the development of modern medicine, average life expectancy in humans was a bit longer than Asian elephants but a bit shorter than African elephants. Evolutionary biologists don’t have a singular and precise theory about life span, but it can be safely assumed that humans’ are atypically long lived for primates for the same reasons sexual maturation in the younger generation also takes longer. Designating causes and effects gets much more difficult than people think, so which *results* in the other isn’t a simplistic issue, and they aren’t necessarily directly related.
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