Actually a medieval person or neolithic person would have derived large future ages, because in those epochs population growth was slow and arguably not even ex

Actually a medieval person or neolithic person would have derived large future ages, because in those epochs population growth was slow and arguably not even exponential. The fact we know there is a fast rise and possible peak in world population around 2050 means most humans born or ever to be born will be born in the years ~1700-2200. This is pure math, and an argument against it is an argument against the Copernican principle.