About life and death : Every book must have an end so that you can complete it and remember or forget depending on the intrinsic substance. Similarly Life of one is a book with death being the end so that others can understand and learn from that life or forget  it depending on the quality of life lead by that person.  All the morals, values, virtues that we carry like a great knowledge bank are all learned from Lives lived by others. Ofcourse it does not mean humans die for others to learn something from it ! But so far this is the only positive utilization of death of one to other’s life.