In the beginning, God made Adam and Eve. Tagging humans since his emergence in the garden of Eden is the fallibility of all things made; attrition of age. The inevitable wear and tear of use eventually outstrips the pace of biological restitution and man eventually succumbs to the unkind demands of aging and inevitability of death.
Some regard to this phenomenon as the imperfections in creation, or the quackery of the creator if you trade in heresy. I call it genius of creation or the creator. Think about it, man has no natural predator and earth is not boundless. Absent of death as a natural culler, it is imaginable that human population would have overrun earth and its resources. In my lifetime, we’ve seeded 2 billion additional humans and counting. Adding to our fecundity is the newfound ways of living longer, death is increasingly challenged these days. Simple math; the living + the undead equals overcrowding and eventual resource deficit, we will end up eating our young. Literally.
Ever heard of the Gilgamesh Project? Immortality may be unachievable but amortality is an acceptable alternative. Humans are refusing to accept death as is; it is to be challenged and not accepted. At some point, in the next 2-3 decades, our increasing understanding of the roles of AI, IT and data usage in medicine coupled with advancements in molecular biology may take us to the edge of amortality