The idea of extremely long life has been a fascinating one. Immortality (or eternal life) is the concept of living in a physical or spiritual form for an infinite or inconceivably vast length of time. As immortality is the negation of mortality—not dying or not being subject to death—it has been a subject of fascination to humanity since at least the beginning of history.
To present day science, it is not known whether human physical immortality is an achievable condition. Biological forms have inherent limitations — for example, their fragility and slow adaptability to changing environments, which may or may not be able to be overcome through medical interventions or engineering.
However, as of 2009, we do know that natural selection has developed biological immortality in at least one species, the jellyfish Turritopsis nutricula, one consequence of which is a worldwide population explosion of the organism.
According to Wikipedia - Biological immortality is the absence of a sustained increase in rate of mortality as a function of chronological age. A cell or organism that does not experience, or at some future point will cease, aging, is biologically immortal. However this definition of immortality was challenged in the new "Handbook of the Biology of Aging", because the increase in rate of mortality as a function of chronological age may be negligible at extremely old ages (late-life mortality plateau). But even though the rate of mortality ceases to increase in old age, those rates are very high.
Biologists have chosen the word immortal to designate cells that are not limited by the Hayflick limit (where cells no longer divide because of DNA damage or shortened telomeres). (Prior to the work of Leonard Hayflick there was the erroneous belief fostered by Alexis Carrel that all normal somatic cells are immortal.)
However, there is definite agreement on one fact at least - The immortality of a single cell has never been observed.
That would be the day!
If it were possible to have immortality in a single cell – this would naturally lead to immortality of a being – steady-state – never decaying, never dying – perpetual existence in a locked state.
Not even regeneration would be needed. Now, what would a time lord think of that idea?
The absence of aging would provide humans with biological immortality, but not invulnerability to death by physical trauma: According to 2002 statistical data, the odds of an individual being traumatically killed are once in every one thousand and seven hundred years.
Some life extensionists, such as those who practice cryonics, have the hope that humans may someday become biologically immortal. This would not be the same as literal immortality, since people are still susceptible to death through external circumstances (either deliberate or accidental).
But is immortality really desirable?
Let’s take a look at some arguments in favor of undesirability of immortality.
Physical immortality has also been imagined as a form of eternal torment, as in Mary Shelley's short story "The Mortal Immortal", the protagonist of which witnesses everyone he cares about dying around him. Jorge Luis Borges explored the idea that life gets its meaning from death in the short story "'The Immortal"; an entire society having achieved immortality, they found time becoming infinite, and so found no motivation for any action.
Here, one of the stories written by Jonathan Swift (author of Gulliver’s travels). He too had basically written against immortality. Of course – everyone assumes that to live forever means to live forever in a state of youth. Swift was rather astute to point out that this may not always be the case. Immortality trapped in an old body is worse than a curse!
Humans being social animals - to really live, alone, for a long time – is quite undesirable indeed.
Ethics of immortality
The possibility of clinical immortality raises a host of medical, philosophical, and religious issues and ethical questions. These include persistent vegetative states, the nature of personality over time, technology to mimic or copy the mind or its processes, social and economic disparities created by longevity, and survival of the heat death of the universe.
The social, emotional consequences of achieving extremely long life can very really hard to imagine. We have, in our times, experienced the average human lifespan increase tremendously. Today we do not find it odd to observe and expect that an average human – not subject to disease or trauma would at least live to be beyond 75 terrestrial years. Of course the average lifespan vary by region of earth and type of human gene pool as well.
However, our social customs and society is geared very so much towards the old medieval concept of aging. The so called “middle age” has steadily shifting towards 50s and we have a chance of really observing 80s as being called the middle age factor!
But what of the world population? The social consequences of people continuing to live the way it is done today – with its associated tremendous pressure on the resources of this planet.
There are of course religious viewpoints in this very sensitive subject – but I will deliberately restrict myself from venturing in that direction.
In my view, this planet cannot afford to have extremely long lived humans with their current pattern of consumption at figures of billions. We either need to find a new habitable planet to expand to or vastly change the way we live and consume from the environment.
In my future posts, I will concentrate more on emotional and social consequences of extremely long life spans…
