This Wikipedia article has a review of several evolutionary aging theories: https://en.wikipedia.org/wiki/Evolution_of_ageing https://en.wikipedia.org/wiki/Evo

This Wikipedia article has a review of several evolutionary aging theories: https://en.wikipedia.org/wiki/Evolution_of_ageing https://en.wikipedia.org/wiki/Evolution_of_ageing None of these has been proven or widely accepted, and the entire class of theories has many rebuttals. They are interesting to consider, though.