If an organism didn’t age, it would seem to have an advantage: it would never die of aging and it would continue to reproduce throughout its lifetime; hence the longer an organism lived, the more offspring it would leave, and the fitter in evolutionary terms it would be.
Cracking the Aging Code: The Science Book of the Year
P. D. Mangan

Really? How does it relate to finding food? Surviving the environment? Finding A Mate. Or simply not being eaten?