Humans evolved to live about 20 years after reproducing (to be grandparents), which is unique except for killer whales. This extended lifespan coevolved with active roles: ancestral grandparents worked in fields, hunted, gathered, and provided childcare, staying physically active until death. Modern retirement is a recent Western invention with no precedent in evolutionary history.
factualpending
Speaker
Daniel LiebermanEvidence Quote
“We evolved to be grandparents. But grandparents in the old days weren't... retiring... Grandparents in the in the olden days... are working, right? They're working in the fields, they're hunting, they're gathering”
Source
Harvard Professor: REVEALING The 7 Big LIES About Exercise, Sleep, Running, Cancer & Sugar!!!— The Diary Of A CEOCreated: 8/12/2026, 6:22:05 PM
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