Evolution and social consequences of old age: Infant survival and elders

“The fundamental structure of human populations has changed exactly twice in evolutionary history. The second time was in the past 150 years, when the average lifespan doubled in most parts of the world. The first time was in the Paleolithic, probably around 30,000 years ago. That’s when old people were basically invented.”

via Evolution and social consequences of old age: Infant survival and elders. – Slate Magazine.

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