I think that some points in this article are a bit misleading. Much of the focus is on an increase in the average life span of the population, of which a large portion can be attributed to a reduction in infant mortality and an increase in sanitation, or treatments of common disorders. However, for 100+ year lifespans and (optimistically) 1000 year life spans, we would need to drastically increase the maximum life sp…
I was thinking the same thing. If we still had to feed ourselves by hunting mammoth with nothing but pointy sticks and sharp rocks we probably wouldn't live much longer than 18 even today.