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The problem there is with your definition of grandfather. Currently, the age for a grandfather in developed countries is 55+. For most of humanity's history, if

The problem there is with your definition of grandfather. Currently, the age for a grandfather in developed countries is 55+. For most of humanity's history, if there were grandfathers, they would barely make it to 55 years of age.

saagarjha 1y ago
No, plenty of people made it to that age in the past. Life expectancy was significantly depressed by infant mortality.
- Izikiel43 1y ago
  > in the past What's "in the past" here? Last 200 years? 500? 1000? In evolutionary scale, those numbers are a blip.