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The concept of immortality has been featured in fiction since the Epic of Gilgamesh, the oldest known work of fiction.^[1]^[2] Originally appearing in the domain of mythology, it has later been portrayed in the genres of horror, science fiction, and fantasy. For most of literary history, the dominant perspective has been that the desire for immortality is misguided, strong as it may be;^[3] among the proposed negative effects are ennui, loneliness, and social stagnation. This view was challenged by a large number of authors in the 20th century. The number of immortals present in each story varies from a single person to everyone, and the immortality itself is commonly obtained either from supernatural entities or objects, or through biological or technological means.

History

The oldest known fictional account of immortality is also the oldest surviving work of fiction: the Epic of Gilgamesh, an ancient Sumerian tale from c. 2100 BCE.^[1]^[2] Several Greek myths of antiquity depict mortals being granted everlasting life by the gods.^[2]^[4] In medieval Europe, the Christian legend of the Wandering Jew emerged, wherein a man is cursed to live forever for a slight against Jesus; this story was then reworked over and over again by numerous authors across the centuries, well past the end of the Middle Ages and into the 1800s, with Johann Wolfgang von Goethe and Alexandre Dumas each making their own version which both remain unfinished.^[2]^[4]^[5] The 1800s also saw several Gothic stories of the downsides of immortality.^[3] Progress in the field of medicine inspired science fiction stories about immortality in the late 1800s and early 1900s; most of these took a dim view of the prospect of eternal life but more positive attitudes successively emerged.^[3]^[4] By the 1930s, opinions were divided into camps with respectively favourable and unfavourable views on immortality, a division that continued at least until the 1960s.^[4]^[6] Following research into biotechnology and cryonics, the conception that not having to die of old age might soon be a medical reality gained popularity—reflected in the non-fiction works The Prospect of Immortality by Robert Ettinger from 1964 and Conquest of Death by Alvin Silverstein from 1979—and since at least the 1980s, there has been a trend of more analytical and evenhanded treatments of immortality in fiction, as well as outright contes philosophiques.^[3]^[6]

Types

Different kinds of immortality have been conceived, the common feature of which is significantly prolonged lifespans. The absence of ageing—i.e. eternal youth—is typically also involved, though some exceptions such as the Greek myth of Tithonus and the Struldbruggs of Jonathan Swift's 1726 novel Gulliver's Travels exist. It may or may not entail being insusceptible to dying from injuries; to distinguish between the concepts, immortality without this property may be referred to by other terms such as emortality, a term used by Alan Harrington and Alvin Silverstein,^[3]^[7]^[6] or postmortality, a term used by Michael Hauskeller.^[8]

The most common form of immortality is that of an individual living a life with an extended duration, but there are also stories featuring multiple beings fusing into an immortal entity—such as Greg Bear's 1985 novel Blood Music—and stories of one individual living multiple lives in succession in a manner akin to reincarnation.^[9] Absolute immortality is uncommon outside of religious contexts and is usually non-corporeal in nature.^[6] Undeath, seen for instance in zombies and vampires, is sometimes considered a form of immortality,^[2]^[8]^[10] and sometimes viewed as a separate concept.^[11] Science fiction occasionally features immortality not of living beings, but of the entire universe by overcoming the issues caused by entropy preventing self-perpetuation; the 1972 novel The Gods Themselves by Isaac Asimov is one example.^[9]

Works of fiction featuring immortality can be classified by the number of immortals: one, several, or everyone. Works with lone immortals can be further subdivided into those where the immortality is a secret and those where it is not.^[9] Conversely, the 1990 novella Outnumbering the Dead by Frederik Pohl features a lone mortal in a world where everyone else is immortal,^[3]^[6]^[12] as does the 2009 film Mr. Nobody.^[8]^[13]

Causes

The means by which immortality is obtained are varied, ranging from the traditional Fountain of Youth and elixir of life to modern medical and technological advancements.^[3]^[6]^[9]

Some authors assume that scientific progress will eventually lead to immortality, and for this reason humans living in the far future are often depicted as having attained this goal, including in Arthur C. Clarke's 1956 novel The City and the Stars.^[2]^[6]^[14] Prior to the first successful blood transfusions, some stories in the late 1800s featured the idea that such procedures would have a rejuvenating effect granting extended lifespans, including Robert Duncan Milne's A Man Who Grew Young Again from 1887; Georges Eekhoud's 1884 story Le coeur de Tony Wandel (Tony Wandel's Heart) utilizes heart transplants in a similar manner.^[6]

Blood is also the source of immortality in James E. Gunn's 1962 novel The Immortals, where a genetic mutation gives rise to blood that confers immortality, which others naturally seek to obtain.^[2]^[15] Other works have also occasionally depicted immortality as being obtained congenitally and/or unintentionally;^[2]^[16] certain fantasy creatures such as the Elves in the works of J. R. R. Tolkien are inherently immortal,^[7] whereas the title character of the 2007 film The Man from Earth is an otherwise ordinary human who stopped ageing for unknown reasons some 14,000 years ago.^[2]^[8]^[17]

Immortality is sometimes bestowed upon humans by aliens (as in Clifford D. Simak's 1963 novel Way Station) or deities (as in the Greek myth of Ganymede), or received through a deal with the Devil;^[2]^[7]^[18] the title character of Oscar Wilde's 1890s novel The Picture of Dorian Gray has a portrait that ages in his stead as the result of an inadvertent such deal.^[19]^[20] The legend of the Flying Dutchman involves immortality being handed down as divine retribution for the captain's blasphemy. Several stories exist in which universal immortality is caused by the personification of Death being (temporarily) incapacitated in some way.^[4]

A commonly occurring motif is that of immortality obtained through the deaths of others. Examples include numerous vampire stories where the vampires' immortality is sustained by drinking human blood, the 2011 film In Time where lifetime is transferred from the multitude of poor to the wealthy elite such that the immortality of the few depends on the deaths of the many, and Norman Spinrad's 1969 novel Bug Jack Barron where the source of immortality is derived from the tissues of murdered children.^[2]^[8]^[18]

In Joe Haldeman's 1974 novel The Forever War, immortality is caused by paradoxes arising from time travel.^[9] Immortality of the mind is sometimes accomplished by periodically transferring it to a new physical body, as in A. E. van Vogt's 1948 novel The World of Null-A.^[9] A kind of non-physical immortality can also be achieved by transferring one's consciousness to a computer, as in William Gibson's 1984 novel Neuromancer.^[9]^[21]^[22]

Outcomes

For the most part, immortality is portrayed as strongly desired yet not truly desirable,^[3]^[6] and the stories it is featured in commonly function as a kind of cautionary tale.^[2]^[18] Some stories such as Patrick O'Leary's 2002 novel The Impossible Bird go so far as to show immortals seeking to regain their mortality.^[9]^[4]

Negative outcomes

Overwhelming ennui or restlessness is often depicted as an inevitable consequence of everlasting life, seen in Michael Moorcock's 1970s The Dancers at the End of Time series among others. Another issue faced by immortals in some works is physical deterioration, either due to ongoing natural senescence or as a direct side-effect of immortality itself, the latter being featured in Aldous Huxley's 1939 story After Many a Summer Dies the Swan where the immortals slowly transform into ape-like creatures and Bob Shaw's 1970 novel One Million Tomorrows where immortality causes impotence.^[3]^[7]^[6] While remaining forever childlike in spirit as well as body makes J. M. Barrie's Peter Pan carefree and joyful, it also leaves him self-centred and unable to form meaningful lasting relationships.^[23] On the other hand, the mismatch of having an ageing mind in an eternally youthful body is a cause of distress in multiple stories featuring child vampires,^[8] and the 1996 novel Holy Fire by Bruce Sterling similarly portrays regaining youth in old age by means of rejuvenation as having unsettling effects on the psyche.^[24] A different psychological side-effect of immortality depicted in some works such as the aforementioned In Time and the works of Roger Zelazny is an increased fear of death, immortal life being "too precious to risk".^[8]^[16] In Richard Cowper's The Tithonian Factor, it is discovered that the afterlife is real, to the chagrin of those who had already acquired immortality when the discovery was made.^[3]^[4]

In works where immortality is not universal, the immortal ones encounter the drawback of outliving their loved ones, depicted for instance in Mary Shelley's 1833 short story "The Mortal Immortal",^[16]^[25]^[26] whereas fictional societies with universal immortality are inherently susceptible to overpopulation, as seen in Richard Wilson's 1965 story The Eight Billion.^[3] Authors often couple immortality with infertility to get around the latter problem.^[27] On the other hand, the absence of reproduction among immortals is also depicted as causing population-wide problems in some works, one example being societal stagnation in Algis Budrys' The End of Summer.^[25] Neil Bell's 1930 novel The Seventh Bowl depicts dire societal consequences when immortality drugs are introduced—not due to immortality itself, but rather due to the actions of those in power in response to the new technology as they seek to further their own goals.^[6]^[28] In the 1888 novel The Inner House by Walter Besant, these problems are combined: a life-extending treatment intended to provide additional yet still limited time for a select few instead results in the emergence of an authoritarian society where everyone's life is prolonged indefinitely and strict population control is enforced where the only births that are allowed are those replacing accidental deaths, resulting in social stagnation in the centuries that follow.^[24]^[29] In José Saramago's 2005 novel Death at Intervals, the unexpected cessation of all death in a society accustomed to its presence causes demographic problems, economic disruption, and shortages of both resources and space.^[30]

The moral cost of attaining immortality is viewed as unacceptable in some works where it hinges on the deaths of others.^[8] Immortals in otherwise mortal societies often feel the need to hide their immortality lest they be locked up in a laboratory for study, a problem faced by the immortal group of people in the aforementioned The Immortals by James Gunn as well as in the 1970 television series The Immortal inspired by Gunn's novel; the lone immortal title characters in the aforementioned The Man from Earth and the 2015 film The Age of Adaline additionally experience the loneliness of having to uproot their lives and move every ten years or so to keep the people around them from noticing that they do not age.^[7]^[17]^[31]

Positive outcomes

There are also works featuring enthusiastic or outright utopian visions of immortality, such as the 1928 novel My First Two Thousand Years by Paul Eldridge and George Sylvester Viereck which portrays the life of a lone immortal as being a position of privilege. These positive depictions typically do not feature universal immortality, George Bernard Shaw's 1921 story Back to Methuselah being a notable exception which received blowback from Karel Čapek in the form of a counterargument in the preface to his 1925 play The Makropoulos Secret.^[3]^[6] Eden Phillpotts' 1916 story The Girl and the Faun takes the position that the costs of immortality are outweighed by its benefits.^[18]^[32]

Others

Other works take a more dispassionate and analytical view of immortality.^[3]^[6] The immortal life of The Man from Earth is portrayed as neither a curse nor a blessing, in contrast to writer Jerome Bixby's previous work on immortality—the 1969 Star Trek episode "Requiem for Methuselah".^[2]^[17] Robert Reed's 2004 alternate history work A Plague of Life examines the consequences of universal immortality on human evolution.^[6] Kate Wilhelm's 1983 novel Welcome, Chaos depicts the effects of immortality on the then-ongoing Cold War.^[3]

With regards to the effect of immortality on one's personality, a couple of works have been suggested to demonstrate immortals being enabled to develop their masculine and feminine sides alike,^[31] and in contrast to the more common depiction of immortals as overcome with ennui, the works of Roger Zelazny portray them as insatiably curious. Zelazny likewise eschews the notion that stagnation is an inevitability for immortals, taking the opposite view that previous experiences enhance future ones and that there is consequently always more to learn and experience in order to grow as a person.^[3]^[6]^[16]

References

^ ^a ^b Harris, Steven B. (2002). Shermer, Michael; Linse, Pat (eds.). Immortality: The Search for Everlasting Life. ABC-CLIO. ISBN 978-1-57607-653-8. Archived (PDF of stand-alone book chapter) from the original on 2021-08-23. {{cite book}}: |work= ignored (help)
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Westfahl, Gary (2021-07-19). "Immortality and Life Extension". Science Fiction Literature through History: An Encyclopedia [2 volumes]. ABC-CLIO. pp. 363–365. ISBN 978-1-4408-6617-3.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o "Immortality". The Encyclopedia of Science Fiction. Retrieved 2021-08-18.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d ^e ^f ^g Stableford, Brian (2006). Joshi, S. T. (ed.). The Immortal. Greenwood Publishing Group. pp. 307–340. ISBN 978-0-313-08100-2. {{cite book}}: |work= ignored (help)
^ Clute, John; Grant, John, eds. (1997). "Wandering Jew". The Encyclopedia of Fantasy. Retrieved 2021-09-07.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o Stableford, Brian M. (2006). "Longevity". Science Fact and Science Fiction: An Encyclopedia. Taylor & Francis. pp. 274–276. ISBN 978-0-415-97460-8.
^ ^a ^b ^c ^d ^e Westfahl, Gary, ed. (2005). Immortality and Longevity. Greenwood Publishing Group. ISBN 978-0-313-32951-7. {{cite book}}: |work= ignored (help)
^ ^a ^b ^c ^d ^e ^f ^g ^h Hauskeller, Michael. "'Life's a bitch, and then you don't die': Postmortality in Film and Television". The Palgrave Handbook of Posthumanism in Film and Television: 205–213. Archived from the original on 2019-04-30.
^ ^a ^b ^c ^d ^e ^f ^g ^h Fischer, John Martin; Curl, Ruth (2009). Fischer, John Martin (ed.). Appendix to Chapter 6: Philosophical Models of Immortality in Science Fiction. Oxford University Press. pp. 93–101. ISBN 978-0-19-537495-7. {{cite book}}: |work= ignored (help)CS1 maint: date and year (link)
^ Greene, Richard (2010). Greene, Richard; Mohammad, K. Silem (eds.). The Badness of Undeath. ISBN 978-1-4596-0107-9. {{cite book}}: |work= ignored (help)
^ Kohon, Gregorio (2015-08-20). Reflections on the Aesthetic Experience: Psychoanalysis and the uncanny. Routledge. ISBN 978-1-317-63615-1. Although aware of their mortality, and perhaps because of it, human beings have always speculated about their finitude. In literature, this has created a particular genre, both oral and written, dedicated to the description of immortal figures and to a meditation on the mortalit of human beings. Is death inevitable? Is there life after death? Can one escape death? These themes appear in many works of modern literature, where death is feared and immortality desired. There is an important distinction to be made between being undead and being immortal. The immortal is supposed to live forever. In contrast, the undead, although dead, cannot leave the world of the living or returns because he is unable to depart from it.
^ "Pohl, Frederik". The Encyclopedia of Science Fiction. Retrieved 2021-08-29.{{cite web}}: CS1 maint: url-status (link)
^ "Mr. Nobody". The Encyclopedia of Science Fiction. Retrieved 2021-08-29.{{cite web}}: CS1 maint: url-status (link)
^ Guthke, Karl Siegfried (2017). "Without Death, No Life: Arthur C. Clarke, The City and the Stars". Life Without End: A Thought Experiment in Literature from Swift to Houellebecq. Boydell & Brewer. pp. 82–90. ISBN 978-1-57113-974-0.
^ "Gunn, James E". The Encyclopedia of Science Fiction. Retrieved 2021-08-21.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d Francavilla, Joseph V. (1984). "These Immortals: An Alternative View of Immortality in Roger Zelazny's Science Fiction". Extrapolation. 25 (1): 20–33. doi:10.3828/extr.1984.25.1.20. ISSN 0014-5483.
^ ^a ^b ^c "Jerome Bixby's The Man from Earth". The Encyclopedia of Science Fiction. Retrieved 2021-08-21.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d Clute, John; Grant, John, eds. (1997). "Immortality". The Encyclopedia of Fantasy. Retrieved 2021-08-21.{{cite web}}: CS1 maint: url-status (link)
^ Guthke, Karl Siegfried (2017). "The Scandal of Eternal Beauty: Oscar Wilde, The Picture of Dorian Gray". Life Without End: A Thought Experiment in Literature from Swift to Houellebecq. Boydell & Brewer. pp. 90–101. ISBN 978-1-57113-974-0.
^ Magnúsdóttir, Svanhvít Helga (2015). "The Battle of Good and Evil in The Picture of Dorian Gray" (PDF). p. 11–12. Archived (PDF) from the original on 2020-03-21. Retrieved 2021-08-23.
^ Hayles, N. Katherine (2018-02-20). "How Cyberspace Signifies: Taking Immortality Literally". In Benford, Gregory; Westfahl, Gary (eds.). Bridges to Science Fiction and Fantasy: Outstanding Essays from the J. Lloyd Eaton Conferences. McFarland. ISBN 978-1-4766-3193-6.
^ McKee, Gabriel (2007). "Imagining the Afterlife". The Gospel According to Science Fiction: From The Twilight Zone to the Final Frontier. Westminster John Knox Press. pp. 225–226. ISBN 978-1-61164-426-5.
^ Guthke, Karl Siegfried (2017). "Euphoria of Eternal Youth: J. M. Barrie, Peter Pan". Life Without End: A Thought Experiment in Literature from Swift to Houellebecq. Boydell & Brewer. pp. 35–42. ISBN 978-1-57113-974-0.
^ ^a ^b Botelho, Teresa (2019). Kong, Mário S. Ming; Monteiro, Maria do Rosário; Neto, Maria João Pereira (eds.). The cure for death: Fantasies of longevity and immortality in speculative fiction. CRC Press. pp. 431–436. ISBN 978-1-000-73406-5. {{cite book}}: |work= ignored (help)
^ ^a ^b Clark, Stephen R. L. (2008). "The end of summer". How to Live Forever: Science Fiction and Philosophy. Routledge. ISBN 978-1-134-80006-3.
^ Gazzaz, Rasha Asim Hussein (2019-05-11). "Psychological Anxieties in Mary Shelley's "The Mortal Immortal"". Journal of King Abdulaziz University: Arts and Humanities. 27 (5): 249–258. doi:10.4197/Art.27-5.11. ISSN 1658-4295.
^ Grech, Victor E.; Vassallo, Clare; Callus, Ivan (2012). "Immortality and Infertility in Science Fiction: Who Wants To Live Forever?" (PDF). SFRA Review. 299. Archived (PDF) from the original on 2021-08-19.
^ "Bell, Neil". The Encyclopedia of Science Fiction. Retrieved 2021-08-25.{{cite web}}: CS1 maint: url-status (link)
^ "Besant, Walter". The Encyclopedia of Science Fiction. Retrieved 2021-08-29.{{cite web}}: CS1 maint: url-status (link)
^ Kundu, Devaleena (2015). Teodorescu, Adriana (ed.). The Paradox of Mortality: Death and Perpetual Denial. Cambridge Scholars Publishing. pp. 8–23. ISBN 978-1-4438-7298-0. {{cite book}}: |work= ignored (help)
^ ^a ^b Westfahl, Gary (2015-04-25). "Methuselah's Daughter: A Review of The Age of Adaline". Locus Online. Retrieved 2021-08-25.{{cite web}}: CS1 maint: url-status (link)
^ Stableford, Brian (2009-08-13). "Immortality". The A to Z of Fantasy Literature. Scarecrow Press. pp. 214–216. ISBN 978-0-8108-6345-3.

@@ Line 34: / Line 34: @@
 In works where immortality is not universal, the immortal ones encounter the drawback of outliving their loved ones, depicted for instance in [[Mary Shelley]]'s 1833 short story "[[The Mortal Immortal]]",<ref name="Zelazny" /><ref name="ClarkHowToLiveForever">{{Cite book|last=Clark|first=Stephen R. L.|chapter-url=https://books.google.com/books?id=oRKGAgAAQBAJ&pg=PT17|title=How to Live Forever: Science Fiction and Philosophy|date=2008|publisher=Routledge|isbn=978-1-134-80006-3|language=en|chapter=The end of summer|author-link=Stephen R. L. Clark}}</ref><ref>{{Cite journal|last=Gazzaz|first=Rasha Asim Hussein|date=2019-05-11|title=Psychological Anxieties in Mary Shelley's "The Mortal Immortal"|journal=Journal of King Abdulaziz University: Arts and Humanities|volume=27|issue=5|pages=249–258|doi=10.4197/Art.27-5.11|issn=1658-4295|doi-access=free}}</ref> whereas fictional societies with universal immortality are inherently susceptible to [[overpopulation]], as seen in [[Richard Wilson (author)|Richard Wilson]]'s 1965 story ''[[The Eight Billion]]''.<ref name="SFEncyclopediaImmortality" /> Authors often couple immortality with infertility to get around the latter problem.<ref>{{Cite journal|last1=Grech|first1=Victor E.|last2=Vassallo|first2=Clare|last3=Callus|first3=Ivan|date=2012|title=Immortality and Infertility in Science Fiction: Who Wants To Live Forever?|url=https://www.um.edu.mt/library/oar/bitstream/123456789/25497/1/immortality%20paper%20sfra%20%282%29.pdf|url-status=live|journal=[[SFRA Review]]|language=en|volume=299|archive-url=https://web.archive.org/web/20210819173102/https://www.um.edu.mt/library/oar/bitstream/123456789/25497/1/immortality%20paper%20sfra%20(2).pdf|archive-date=2021-08-19}}</ref> On the other hand, the absence of reproduction among immortals is also depicted as causing population-wide problems in some works, one example being societal stagnation in [[Algis Budrys]]' ''The End of Summer''.<ref name="ClarkHowToLiveForever" /> [[Stephen Southwold|Neil Bell]]'s 1930 novel ''[[The Seventh Bowl]]'' depicts dire societal consequences when immortality drugs are introduced—not due to immortality itself, but rather due to the actions of those in power in response to the new technology as they seek to further their own goals.<ref name="ScienceFactAndScienceFictionLongevity" /><ref>{{Cite web|title=Bell, Neil|url=http://www.sf-encyclopedia.com/entry/bell_neil|url-status=live|access-date=2021-08-25|website=[[The Encyclopedia of Science Fiction]]}}</ref> In the 1888 novel ''[[The Inner House (novel)|The Inner House]]'' by [[Walter Besant]], these problems are combined: a life-extending treatment intended to provide additional yet still limited time for a select few instead results in the emergence of an [[Authoritarianism|authoritarian]] society where everyone's life is prolonged indefinitely and strict [[population control]] is enforced where the only births that are allowed are those replacing accidental deaths, resulting in social stagnation in the centuries that follow.<ref name="Botelho">{{Cite book|last=Botelho|first=Teresa|url=https://books.google.com/books?id=pcO2DwAAQBAJ&pg=PA431|title=The cure for death: Fantasies of longevity and immortality in speculative fiction|work=Intelligence, Creativity and Fantasy: Proceedings of the 5th International Multidisciplinary Congress (PHI 2019), October 7-9, 2019, Paris, France|publisher=CRC Press|year=2019|isbn=978-1-000-73406-5|editor-last=Kong|editor-first=Mário S. Ming|pages=431–436|language=en|editor-last2=Monteiro|editor-first2=Maria do Rosário|editor-last3=Neto|editor-first3=Maria João Pereira}}</ref><ref>{{Cite web|title=Besant, Walter|url=http://www.sf-encyclopedia.com/entry/besant_walter|url-status=live|access-date=2021-08-29|website=[[The Encyclopedia of Science Fiction]]}}</ref> In [[José Saramago]]'s 2005 novel ''[[Death at Intervals]]'', the unexpected cessation of all death in a society accustomed to its presence causes demographic problems, economic disruption, and shortages of both resources and space.<ref>{{Cite book|last=Kundu|first=Devaleena|url=https://books.google.com/books?id=h_KmBgAAQBAJ&pg=PA8|title=The Paradox of Mortality: Death and Perpetual Denial|date=2015|work=Death Representations in Literature: Forms and Theories|publisher=Cambridge Scholars Publishing|isbn=978-1-4438-7298-0|editor-last=Teodorescu|editor-first=Adriana|pages=8–23|language=en}}</ref>
-The moral cost of attaining immortality is viewed as unacceptable in some works where it hinges on the deaths of others.<ref name="Hauskeller" /> Immortals in otherwise mortal societies often feel the need to hide their immortality lest they be locked up in a laboratory for study, a problem faced by the immortal group of people in [[Robert A. Heinlein]]'s 1958 novel ''[[Methuselah's Children]]'', and the lone immortal title characters in the aforementioned ''The Man from Earth'' and the 2015 film ''[[The Age of Adaline]]'' additionally experience the loneliness of having to uproot their lives and move every ten years or so to keep the people around them from noticing that they do not age.<ref name="GreenwoodEncyclopediaImmortality" /><ref name="TheManFromEarth" /><ref name="TheAgeOfAdaline">{{Cite web|last=Westfahl|first=Gary|author-link=Gary Westfahl|date=2015-04-25|title=Methuselah's Daughter: A Review of The Age of Adaline|url=https://locusmag.com/2015/04/methuselahs-daughter-a-review-of-the-age-of-adaline/|url-status=live|access-date=2021-08-25|website=[[Locus Online]]|language=en-US}}</ref>
+The moral cost of attaining immortality is viewed as unacceptable in some works where it hinges on the deaths of others.<ref name="Hauskeller" /> Immortals in otherwise mortal societies often feel the need to hide their immortality lest they be locked up in a laboratory for study, a problem faced by the immortal group of people in the aforementioned ''The Immortals'' by James Gunn as well as in the 1970 television series ''[[The Immortal (1970 TV series)|The Immortal]]'' inspired by Gunn's novel; the lone immortal title characters in the aforementioned ''The Man from Earth'' and the 2015 film ''[[The Age of Adaline]]'' additionally experience the loneliness of having to uproot their lives and move every ten years or so to keep the people around them from noticing that they do not age.<ref name="GreenwoodEncyclopediaImmortality" /><ref name="TheManFromEarth" /><ref name="TheAgeOfAdaline">{{Cite web|last=Westfahl|first=Gary|author-link=Gary Westfahl|date=2015-04-25|title=Methuselah's Daughter: A Review of The Age of Adaline|url=https://locusmag.com/2015/04/methuselahs-daughter-a-review-of-the-age-of-adaline/|url-status=live|access-date=2021-08-25|website=[[Locus Online]]|language=en-US}}</ref>
 === Positive outcomes ===