The burden of aging falls most heavily on the poor, though it has to be said that the differences between rich and poor are small in comparison to the absolute degree of harm done by aging.

It has been a disappointment to see the Gates Foundation near entirely bypass this area of research up to fairly recently, presumably because they do hold this strange view of aging being either a non-issue, or a problem of wealthy regions.

From a utilitarian perspective, nothing that goes on in the poorest parts of the world rises to the level of harm done by age-related disease. Not even close.