Aging

From an evolutionary perspective, we only live as long as we need to replace ourselves efficiently. For example:

• Mice live 2-3 years. They divert most of their resources into reproducing rapidly and little into preserving their bodies.
• Whales live hundreds of years because they're at the top of the food chain and they can live as long as they want. So they breed slowly and build a body that lasts.
• We, as humans, are somewhere in between mice and whales.

From a biological perspective, there's no maximum to human lifespan. There's nothing that says biological organisms have to die.