> forgetting that our ancestors died extremely early relative to modern humans.
While it's true that average life expectancy has increased, it's not really accurate to say that "our ancestors died extremely early". See "Did Ancient People Die Young?" at https://www.sapiens.org/biology/human-lifespan-history/ :
> Mortality rates in traditional populations are high during infancy, before decreasing sharply to remain constant till about 40 years, then mortality rises to peak at about 70. Most individuals remain healthy and vigorous right through their 60s or beyond, until senescence sets in, which is the physical decline where if one cause fails to kill, another will soon strike the mortal blow.
While it's true that average life expectancy has increased, it's not really accurate to say that "our ancestors died extremely early". See "Did Ancient People Die Young?" at https://www.sapiens.org/biology/human-lifespan-history/ :
> Mortality rates in traditional populations are high during infancy, before decreasing sharply to remain constant till about 40 years, then mortality rises to peak at about 70. Most individuals remain healthy and vigorous right through their 60s or beyond, until senescence sets in, which is the physical decline where if one cause fails to kill, another will soon strike the mortal blow.