There are two sides to every proposition and the subject of attaining immortality is no exception.  Here are some common reasons that various naysayers come up with when broached with the question “Do you want to live forever?”  Some reasons may be trivial or outright fallacious to begin with while some may actually have some merit to it and would essentially be viable for future studies.

  1. Evolution Humans are continually evolving and, sooner or later, a lone immortal person may suffer from social and reproductive isolation as the population around him starts to evolve into something more advanced after about a million years from now.  Safety and security may also be a concern as a more evolved version of the human race may see the immortal individual as an oddity and seek to capture it.
  2. Mental aging.  A person’s memory degrades as he gets older. The brain has a limited ability to store and recall memories and memories tend to pile up as people age over the decades.  Memories may be stored as time goes on, but recall gets a lot more difficult as the traces of events or learning that has happened in the past get in the way of remembering new material or memories.
  3. The possibility of being trapped for an indefinite period of time, i.e. in cases of accidental immurement or burial.
  4. Overpopulation.  An immortal population will hypothetically create stress on its proximal environment due to overconsumption of natural resources and increasing demand for shelter and the fulfillment of basic social wants and needs. One way to deal with this dilemma is to undergo what is called generational cleansing, a form of voluntary euthanasia done by a more senior population to pave the way for a younger generation to act as leaders in their middle age, has been opined by John Harris in his paper “Immortal Ethics,” published in the Annals of New York Academy of Sciences in 2004.
  5. Abject boredom and stagnation.  Even at this stage, there are concerns that a person may get tired or weary at his current state of life particularly when he starts to succumb to the monotony of his activities and his overall routine, and runs out of new things to do. The resulting sense of despondency and ennui may pave the way for the immortal entity to long for death in the long run as there would be no other purpose left to live for.
  6. The immortality divide.  The availability of immortality on a mass scale can aggravate the presently growing divide between the rich and the poor, the haves and the have-nots. The technology would readily be accessible to the affluent and to those who can afford the service, prolonging and enhancing their power and influence in the course of centuries. Those who cannot afford it, however, could not compete with such odds considering their dwindling choices to compete economically against an immortal elite class, thereby stagnating the free market.
  7. War and suffering will still be there.  Immortality does not necessarily equate to peace and prosperity, nor does it translate to invincibility. Humans have been known to wage war and kill each other for various reasons, and immortality simply creates an avenue for individuals to witness more of such horrors in their indefinite lifetimes. Depression and psychological trauma resulting from such adversities and experiences will still be present despite the advent of biological immortality.