I think I can do better. Michael Rose breed fruit flies selecting for longevity. I believed his work showed that it was possible to extend lifespan simply by introducing the right selective pressure. If this doesn't demonstrate that aging is the result of Evolutionary processes, I don't know what will.

Here's his profile: https://scholar.google.com/citations?user=NCQ3E5sAAAAJ&hl=en...

No one reasonably disputes that aging is the result of an evolutionary process. But that's a far cry from explaining exactly "why we see super-exponential decay in mortality distributions".