It would seem to be an impossible task to argue that the lives of those who no longer exist were and are, in any truly meaningful way, of "benefit" to inanimate objects like the environment, or to non-conscious elements such as the evolutionary genetic pool, or to argue that they contributed to abstract concepts such as art and science and "humankind" taken as a whole. It seems less difficult to accept a non-physical life after death, which we are somehow spatially separated from, than it is to construct an anthropomorphic existence within the physical universe that somehow survives death.