u/New-Block6635

Random thought I went down a rabbit hole on and now I need smarter people to weigh in:
From what I understand, humans used to have a life expectancy around like 25–35 back in prehistoric times, and even by the 1800s it was only like 35–45. Then suddenly (relatively speaking) it jumps to 70+ today.
Did our bodies even “adapt” to living this long, or are we kind of pushing past what we evolved for?
Are things like Alzheimer’s, heart disease, etc. partly because we’re living way longer than humans used to?