Death by Natural Causes?

There are over 2000 things under the umbrella of death by natural causes,I learned watching a national geographic program,The fact that over 2000 things can be accepted as "Natural",is in my opinion fatalism in it's worst.My first question is when I hear the term "Death by old age",what am I really hearing (She got to old,the body just decided to die),In death by old age is there m organ failure,or somekind of pattern,or is it simply ignorance about why old people die,and we fatalistically,pessimisticly declare that it's just natural.In the 100,000 years of humankind the only thing we've all unanimously succeded at was dying and accepting this as a fact of eventuality.What if we were to eliminate all 2000 + natural causes,including sucbing to old age. What if the only ways to die were if the body was completely and utterly destroyed,but pending accident or foul play people lived on,the word "old" became a colloquial phrase,and modern medicine triumphed over any disease including Cancer and AIDS.The inevitable overpopulation would be an afterthought to me,considering everyone lived eternally by the means of science.A more pragmatic approach than fairytales,currently what I say is science fiction,but optimistically one day it will be science.Your thoughts?