"[arguing] that immune functions and nutrition have been of major importance in the evolution of aging and longevity."
According to this, humans started to regularly consume meat. Meat itself, carrion or injuries during hunting have chances of getting infected and thereby causing death to humans. A strong defensive system against infections lets you survive and its coming into existence may be accompanied by an elongation of our lifespan.
I find myself now asking two questions:
(1) Because the whole article is only about the primate branch, I wonder, whether there are other omnivores that drifted apart concerning their eating habits and if now there is a more carnivorous, longer-living genus?
(2) Do carnivores, in general, have a long lifespan (or is their lifespan highly dependent on a healthy predator–prey equation)? I tried googling, but could not find a relevant scientific resource on this topic.