Immortality
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Immortality is the concept of eternal life.[2] Some species possess 'biological immortality' due to an apparent lack of the Hayflick limit.[3][4]
Some scientists,
From at least the time of the
Definitions
Scientific
Religious
Immortality in religion refers usually to either the belief in physical immortality or a more spiritual
Physical immortality
Physical immortality is a state of life that allows a person to avoid death and maintain conscious thought. It can mean the unending existence of a person from a physical source other than organic life, such as a computer.
Pursuit of physical immortality before the advent of modern science included alchemists, who sought to create the Philosopher's Stone,[15] and various cultures' legends such as the Fountain of Youth or the Peaches of Immortality inspiring attempts at discovering an elixir of life.[16][17]
Modern scientific trends, such as
Causes of death
There are three main causes of death:
Aging
Disease
Disease is theoretically surmountable by technology. In short, it is an abnormal condition affecting the body of an organism, something the body should not typically have to deal with its natural make up.
Trauma
Environmental change
Organisms otherwise unaffected by these causes of death would still face the problem of obtaining sustenance (whether from currently available agricultural processes or from hypothetical future technological processes) in the face of changing availability of suitable resources as environmental conditions change. After avoiding aging, disease, and trauma, death through resource limitation is still possible, such as
If there is no limitation on the degree of gradual mitigation of risk then it is possible that the
Biological immortality
Biological immortality is an absence of aging. Specifically it is the absence of a sustained increase in
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. The first and still most widely used immortal cell line is HeLa, developed from cells taken from the malignant cervical tumor of Henrietta Lacks without her consent in 1951. Prior to the 1961 work of Leonard Hayflick, there was the erroneous belief fostered by Alexis Carrel that all normal somatic cells are immortal. By preventing cells from reaching senescence one can achieve biological immortality; telomeres, a "cap" at the end of DNA, are thought to be the cause of cell aging. Every time a cell divides the telomere becomes a bit shorter; when it is finally worn down, the cell is unable to split and dies. Telomerase is an enzyme which rebuilds the telomeres in stem cells and cancer cells, allowing them to replicate an infinite number of times.[26] No definitive work has yet demonstrated that telomerase can be used in human somatic cells to prevent healthy tissues from aging. On the other hand, scientists hope to be able to grow organs with the help of stem cells, allowing organ transplants without the risk of rejection, another step in extending human life expectancy. These technologies are the subject of ongoing research, and are not yet realized.[27]
Biologically immortal species
Life defined as biologically immortal is still susceptible to causes of death besides aging, including disease and trauma, as defined above. Notable immortal species include:
- Bacteria – Bacteria reproduce through
Evolution of aging
As the existence of biologically immortal species demonstrates, there is no thermodynamic necessity for senescence: a defining feature of life is that it takes in free energy from the environment and unloads its entropy as waste. Living systems can even build themselves up from seed, and routinely repair themselves. Aging is therefore presumed to be a byproduct of evolution, but why mortality should be selected for remains a subject of research and debate. Programmed cell death and the telomere "end replication problem" are found even in the earliest and simplest of organisms.[35] This may be a tradeoff between selecting for cancer and selecting for aging.[36]
Modern theories on the evolution of aging include the following:
- Mutation accumulation is a theory formulated by Peter Medawar in 1952 to explain how evolution would select for aging. Essentially, aging is never selected against, as organisms have offspring before the mortal mutations surface in an individual.
- George C. Williams, a critic of Medawar, in 1957. In antagonistic pleiotropy, genes carry effects that are both beneficial and detrimental. In essence this refers to genes that offer benefits early in life, but exact a cost later on, i.e. decline and death.[37]
- The disposable soma theory was proposed in 1977 by Thomas Kirkwood, which states that an individual body must allocate energy for metabolism, reproduction, and maintenance, and must compromise when there is food scarcity. Compromise in allocating energy to the repair function is what causes the body gradually to deteriorate with age, according to Kirkwood.[38]
Immortality of the germline
Individual organisms ordinarily age and die, while the germlines which connect successive generations are potentially immortal. The basis for this difference is a fundamental problem in biology. The Russian biologist and historian
Prospects for human biological immortality
Life-extending substances
Some[who?] scientists believe that boosting the amount or proportion of telomerase in the body, a naturally forming enzyme that helps maintain the protective caps at the ends of chromosomes, could prevent cells from dying and so may ultimately lead to extended, healthier lifespans. A team of researchers at the Spanish National Cancer Centre (Madrid) tested the hypothesis on mice. It was found that those mice which were "genetically engineered to produce 10 times the normal levels of telomerase lived 50% longer than normal mice".[40]
In normal circumstances, without the presence of telomerase, if a cell divides repeatedly, at some point all the progeny will reach their Hayflick limit. With the presence of telomerase, each dividing cell can replace the lost bit of DNA, and any single cell can then divide unbounded. While this unbounded growth property has excited many researchers, caution is warranted in exploiting this property, as exactly this same unbounded growth is a crucial step in enabling cancerous growth. If an organism can replicate its body cells faster, then it would theoretically stop aging.
Technological immortality, biological machines, and "swallowing the doctor"
Technological immortality is the prospect for much longer life spans made possible by scientific advances in a variety of fields: nanotechnology, emergency room procedures, genetics,
Cryonics
Mind-to-computer uploading
One idea that has been advanced involves
This could be accomplished via advanced cybernetics, where computer hardware would initially be installed in the brain to help sort memory or accelerate thought processes. Components would be added gradually until the person's entire brain functions were handled by artificial devices, avoiding sharp transitions that would lead to issues of identity, thus running the risk of the person to be declared dead and thus not be a legitimate owner of his or her property. After this point, the human body could be treated as an optional accessory and the program implementing the person could be transferred to any sufficiently powerful computer.
Another possible mechanism for mind upload is to perform a detailed scan of an individual's original, organic brain and simulate the entire structure in a computer. What level of detail such scans and simulations would need to achieve to emulate awareness, and whether the scanning process would destroy the brain, is still to be determined.[a]
It is suggested that achieving immortality through this mechanism would require specific consideration to be given to the role of consciousness in the functions of the mind. An uploaded mind would only be a copy of the original mind, and not the conscious mind of the living entity associated in such a transfer. Without a simultaneous upload of consciousness, the original living entity remains mortal, thus not achieving true immortality.[45] Research on neural correlates of consciousness is yet inconclusive on this issue. Whatever the route to mind upload, persons in this state could then be considered essentially immortal, short of loss or traumatic destruction of the machines that maintained them.[clarification needed][citation needed]
Cybernetics
Transforming a human into a
Digital immortality
Religious views
As late as 1952, the editorial staff of the
Abrahamic religion
The viewpoints of
.Christianity
Christian theology holds that Adam and Eve lost physical immortality for themselves and all their descendants through the Fall, although this initial "imperishability of the bodily frame of man" was "a preternatural condition".[48]
Christians who profess the Nicene Creed believe that every dead person (whether they believed in Christ or not) will be resurrected from the dead at the Second Coming; this belief is known as universal resurrection.[7] Paul the Apostle, in following his past life as a Pharisee (a Jewish social movement that held to a future physical resurrection[49]), proclaims an amalgamated view of resurrected believers where both the physical and the spiritual are rebuilt in the likeness of post-resurrection Christ, who "will transform our lowly body to be like his glorious body" (ESV).[50] This thought mirrors Paul's depiction of believers having been "buried therefore with him [that is, Christ] by baptism into death" (ESV).[51]
Christian apocrypha include immortal human figures such as
Many Patristic writers have connected the immortal rational soul to the image of God found in Genesis 1:26. Among them is Athanasius of Alexandria and Clement of Alexandria, who say that the immortal rational soul itself is the image of God.[57] Even Early Christian Liturgies exhibit this connection between the immortal rational soul and the creation of humanity in the image of God.[57]
Islam
Islamic beliefs bears the concept of spiritual immortality within it; following the death of a certain individual, it will be arbitrated consistent with its beliefs as well as actions and will embark on the ever-lasting place where they will abate. The
In contrast, the kafir hold the contradictory notion that they abide in Jahannam perpetually.[58][59][60]
كُلُّ نَفْسٍ ذَائِقَةُ الْمَوْتِ (Every soul will taste death)
— Quran 3:185
Judaism
The traditional concept of an immaterial and immortal soul distinct from the body was not found in Judaism before the
The only Hebrew word traditionally translated "soul" (nephesh) in English language Bibles refers to a living, breathing conscious body, rather than to an immortal soul.[b] In the New Testament, the Greek word traditionally translated "soul" (ψυχή) has substantially the same meaning as the Hebrew, without reference to an immortal soul.[c] "Soul" may refer either to the whole person, the self, as in "three thousand souls" were converted in Acts 2:41 (see Acts 3:23).
The
The views about immortality in Judaism is perhaps best exemplified by the various references to this in
Dharmic religions
The perspectives on immortality within
Hinduism
There are explicit renderings in the
Another view of immortality is traced to the Vedic tradition by the interpretation of Maharishi Mahesh Yogi:
That man indeed whom these (contacts)
do not disturb, who is even-minded in
pleasure and pain, steadfast, he is fit
for immortality, O best of men.[80]
To Maharishi Mahesh Yogi, the verse means, "Once a man has become established in the understanding of the permanent reality of life, his mind rises above the influence of pleasure and pain. Such an unshakable man passes beyond the influence of death and in the permanent phase of life: he attains eternal life ... A man established in the understanding of the unlimited abundance of absolute existence is naturally free from existence of the relative order. This is what gives him the status of immortal life."[80]
An Indian Tamil saint known as
Buddhism
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One of the three marks of existence in Buddhism is
Ancient religions
Within the intricate tapestry of ancient religious ideologies, delve into a profound contemplation of the concept of immortality. Simultaneously, broaden the expanse of this intellectual exploration, allowing for a more comprehensive examination of the subject matter.
Ancient Greek religion
Immortality in
In
Writing his Lives of Illustrious Men (
The parallel between these traditional beliefs and the later resurrection of Jesus was not lost on early Christians, as Justin Martyr argued:
- "when we say ... Jesus Christ, our teacher, was crucified and died, and rose again, and ascended into heaven, we propose nothing different from what you believe regarding those whom you consider sons of Zeus."[91]
The philosophical idea of an immortal soul was a belief first appearing with either
Zoroastrianism
Philosophical religions
Within the realm of philosophical religious paradigms, engage in a profound exploration of the concept of immortality. Simultaneously, expand the breadth and depth of this intellectual inquiry to afford a more intricate examination of the subject matter.
Taoism
It is repeatedly stated in the Lüshi Chunqiu that death is unavoidable.[93] Henri Maspero noted that many scholarly works frame Taoism as a school of thought focused on the quest for immortality.[94] Isabelle Robinet asserts that Taoism is better understood as a way of life than as a religion, and that its adherents do not approach or view Taoism the way non-Taoist historians have done.[95] In the Tractate of Actions and their Retributions, a traditional teaching, spiritual immortality can be rewarded to people who do a certain amount of good deeds and live a simple, pure life. A list of good deeds and sins are tallied to determine whether or not a mortal is worthy. Spiritual immortality in this definition allows the soul to leave the earthly realms of afterlife and go to pure realms in the Taoist cosmology.[96]
Philosophical arguments for the immortality of the soul
Alcmaeon of Croton
Alcmaeon of Croton argued that the soul is continuously and ceaselessly in motion. The exact form of his argument is unclear, but it appears to have influenced Plato, Aristotle, and other later writers.[97]
Plato
Plato's Phaedo advances four arguments for the soul's immortality:[98]
- The Cyclical Argument, or Opposites Argument explains that Forms are eternal and unchanging, and as the soul always brings life, then it must not die, and is necessarily "imperishable". As the body is mortal and is subject to physical death, the soul must be its indestructible opposite. Plato then suggests the analogy of fire and cold. If the form of cold is imperishable, and fire, its opposite, was within close proximity, it would have to withdraw intact as does the soul during death. This could be likened to the idea of the opposite charges of magnets.
- The Theory of Recollection explains that we possess some non-empirical knowledge (e.g. The Form of Equality) at birth, implying the soul existed before birth to carry that knowledge. Another account of the theory is found in Plato's Meno, although in that case Socrates implies anamnesis (previous knowledge of everything) whereas he is not so bold in Phaedo.
- The Affinity Argument, explains that invisible, immortal, and incorporeal things are different from visible, mortal, and corporeal things. Our soul is of the former, while our body is of the latter, so when our bodies die and decay, our soul will continue to live.
- The Argument from Form of Life or The Final Argument explains that the Forms, incorporeal and static entities, are the cause of all things in the world, and all things participate in Forms. For example, beautiful things participate in the Form of Beauty; the number four participates in the Form of the Even, etc. The soul, by its very nature, participates in the Form of Life, which means the soul can never die.
Plotinus
Plotinus offers a version of the argument that Kant calls "The Achilles of Rationalist Psychology". Plotinus first argues that the soul is simple, then notes that a simple being cannot decompose. Many subsequent philosophers have argued both that the soul is simple and that it must be immortal. The tradition arguably culminates with Moses Mendelssohn's Phaedon.[99]
Metochites
Theodore Metochites argues that part of the soul's nature is to move itself, but that a given movement will cease only if what causes the movement is separated from the thing moved – an impossibility if they are one and the same.[100]
Avicenna
Avicenna argued for the distinctness of the soul and the body, and the incorruptibility of the former.[d]
Aquinas
The full argument for the immortality of the soul and Thomas Aquinas' elaboration of Aristotelian theory is found in Question 75 of the First Part of the Summa Theologica.[106]
Descartes
René Descartes endorses the claim that the soul is simple, and also that this entails that it cannot decompose. Descartes does not address the possibility that the soul might suddenly disappear.[107]
Leibniz
In early work, Gottfried Wilhelm Leibniz endorses a version of the argument from the simplicity of the soul to its immortality, but like his predecessors, he does not address the possibility that the soul might suddenly disappear. In his monadology he advances a sophisticated novel argument for the immortality of monads.[108]
Moses Mendelssohn
Moses Mendelssohn's Phaedon is a defense of the simplicity and immortality of the soul. It is a series of three dialogues, revisiting the Platonic dialogue Phaedo, in which Socrates argues for the immortality of the soul, in preparation for his own death. Many philosophers, including Plotinus, Descartes, and Leibniz, argue that the soul is simple, and that because simples cannot decompose they must be immortal. In the Phaedon, Mendelssohn addresses gaps in earlier versions of this argument (an argument that Kant calls the Achilles of Rationalist Psychology). The Phaedon contains an original argument for the simplicity of the soul, and also an original argument that simples cannot suddenly disappear. It contains further original arguments that the soul must retain its rational capacities as long as it exists.[109]
Ethics
The possibility of clinical immortality raises a host of medical, philosophical, and religious issues and ethical questions. These include
Undesirability
Physical immortality has also been imagined as a form of eternal torment, as in the myth of Tithonus, or in Mary Shelley's short story The Mortal Immortal, where the protagonist lives to witness everyone he cares about die around him. For additional examples in fiction, see Immortality in fiction.
Kagan (2012)[110] argues that any form of human immortality would be undesirable. Kagan's argument takes the form of a dilemma. Either our characters remain essentially the same in an immortal afterlife, or they do not:
- If our characters remain basically the same – that is, if we retain more or less the desires, interests, and goals that we have now – then eventually, over an infinite stretch of time, we will get bored and find eternal life unbearably tedious.
- If, on the other hand, our characters are radically changed – e.g., by God periodically erasing our memories or giving us rat-like brains that never tire of certain simple pleasures – then such a person would be too different from our current self for us to care much what happens to them.
Either way, Kagan argues, immortality is unattractive. The best outcome, Kagan argues, would be for humans to live as long as they desired and then to accept death gratefully as rescuing us from the unbearable tedium of immortality.[110]
Sociology
If human beings were to achieve immortality, there would most likely be a change in the world's
Sociology has a growing body of literature on the sociology of immortality, which details the different attempts at reaching immortality (whether actual or symbolic) and their prominence in the 21st century. These attempts include renewed attention to the dead in the West,[114] practices of online memorialization,[115] and biomedical attempts to increase longevity.[116] These attempts at reaching immortality and their effects in societal structures have led some to argue that we are becoming a "Postmortal Society".[117][118] Foreseen changes to societies derived from the pursuit of immortality would encompass societal paradigms and worldviews, as well as the institutional landscape. Similarly, different forms of reaching immortality might entail a significant reconfiguration of societies, from becoming more technologically oriented to becoming more aligned with nature.[119]
Immortality would increase population growth,[120] bringing with it many consequences as for example the impact of population growth on the environment and planetary boundaries.
Politics
Although some scientists state that radical life extension, delaying and stopping aging are achievable,[121] there are no international or national programs focused on stopping aging or on radical life extension. In 2012 in Russia, and then in the United States, Israel and the Netherlands, pro-immortality political parties were launched. They aimed to provide political support to anti-aging and radical life extension research and technologies and at the same time transition to the next step, radical life extension, life without aging, and finally, immortality and aim to make possible access to such technologies to most currently living people.[122]
Some scholars critique the increasing support for immortality projects. Panagiotis Pentaris speculates that defeating ageing as the cause of death comes with a cost: "heightened stratification of humans in society and a wider gap between social classes".[123] Others suggest that other immortality projects like transhumanist digital immortality, radical life extension and cryonics are part of the capitalist fabric of exploitation and control,[124] which aims to extend privileged lives of the economic elite.[125] In this sense, immortality could become a political-economic battleground for the twenty-first century between the haves and have-nots.[123][124]
Symbols
There are numerous symbols representing immortality. The
See also
- Afterlife
- Ambrosia
- Amrita
- Bioethics
- Biogerontology
- Brooke Greenberg
- Crown of Immortality
- Dyson's eternal intelligence
- Elixir of life
- Eternal return
- Eternal youth
- Ghost
- Immortal DNA strand hypothesis
- Immortalist Society
- Immortality in fiction
- Lich
- List of people claimed to be immortal in myth and legend
- Methuselah Mouse Prize
- Molecular nanotechnology
- Negligible senescence
- Tipler's Omega Point
- Organlegging
- Neidan
- Posthuman
- Resurrection
- Queen Mother of the West
- Simulated reality
- Suspended animation
- Undead
- Regeneration (theology)
Footnotes
- ^
The basic idea is to take a particular brain, scan its structure in detail, and construct a software model of it that is so faithful to the original that, when run on appropriate hardware, it will behave in essentially the same way as the original brain.
- — Sandberg & Boström (2008)[44]
- ^ "Even as we are conscious of the broad and very common biblical usage of the term "soul", we must be clear that scripture does not present even a rudimentarily developed theology of the soul. The creation narrative is clear that all life originates with God. Yet the Hebrew scripture offers no specific understanding of the origin of individual souls, of when and how they become attached to specific bodies, or of their potential existence, apart from the body, after death. The reason for this is that, as we noted at the beginning, the Hebrew Bible does not present a theory of the soul developed much beyond the simple concept of a force associated with respiration, hence, a life-force."[71][full citation needed]
- ^ In the New Testament, "soul" (orig. ψυχή ) retains its basic Hebrew sense of meaning. "Soul" refers to one's life: Herod sought Jesus' soul (Matt. 2:20); one might save a soul or take it (Mark 3:4); death occurs when God "requires your soul" (Luke 12:20).
- ^ For Avicenna's views, see: Moussa, Dunya, & Zayed (1960);[101] Arberry (1964);[102] Michot (1986);[103] Janssen (1987);[104] Marmura (2005)(complete translation).[105]
Notes
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- ^ Robinet, Isabelle. Taoism: Growth of a Religion (Stanford: Stanford University Press, 1997 [original French 1992]), p. 3–4.
- ^ Translated by Legge, James. The Texts of Taoism. 1962, Dover Press. NY.
- ^ "Alcmaeon". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. 2021.
- ^ "Plato". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. 2017.
- ^ Henry, D. (2008) "The Neoplatonic Achilles" in "The Achilles of Rationalist Psychology". Springer. Volume 7 of the series Studies in the History of Philosophy of Mind pp. 59–74.
- ^ "Byzantine Philosophy". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab. Stanford University. 2018.
- ^ Moussa, Mohammad Youssef; Dunya, Solayman; Zayed, Sa'id, eds. (1960). Avicenna's Metaphysics: Al-Shifâ', Al-Ilâhiyyât. Vol. II. Cairo, EG: Organisme Général des Imprimeries Gouvernementales. pp. 431–432.
- ^ Aspects of Islamic Civilization. Translated by Arberry, A.J. London, UK: George Allen & Unwin. 1964. p. 153.
- ^ Michot, Jean R. (1986). La destinée de l'homme selon Avicenne. Louvain: Peeters. pp. 22–56, esp. 26–27, 43.
- ^ Janssen, J. (1987). "Ibn Sînâ's ideas of ultimate realities, neoplatonism and the Qur'ân as problem-solving paradigms in the Avicennian system". Ultimate Reality and Meaning. 10: 259–261.
- ^ Marmura, Michael (2005). Avicenna: The metaphysics of the healing. Provo, UT: Brigham Young University Press.
- ^ "Saint Thomas Aquinas". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. 2018.
- ^ Rozemond, M. (2010). "Descartes and the Immortality of the Soul". in Mind, Method and Morality: Essays in Honor of Anthony Kenny. Oxford University Press.
- ^ "Gottfried Wilhelm Leibniz". The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. 2020.
- ^ Sassen, B. (2008). "Kant and Mendelssohn on the Implications of the 'I Think' ".in "The Achilles of Rationalist Psychology". Springer. Volume 7 of the series Studies in the History of Philosophy of Mind pp. 59–74.
- ^ a b
Kagan, Shelly (2012). Death. New Haven, CT: Yale University Press. pp. 238–246.
Kagan notes that his argument is an adaptation of a similar argument given by the British philosopher B. Williams (1973).[111] - ^ Williams, B. (1973). Problems of the Self.
- PMID 28108110, Database: CINAHL Complete]
- ^ He, Goodkind, Kowal, Wan, Daniel, Paul (March 2016). "An Aging World: 2015". International Population Reports: U.S. Census Bureau. 1 (16): 1–30. Retrieved 1 March 2018.
{{cite journal}}
: CS1 maint: multiple names: authors list (link) - ISSN 1357-6275.
- S2CID 218602211.
- S2CID 145387514.
- OCLC 1107015985.)
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: CS1 maint: location missing publisher (link) CS1 maint: others (link - ISSN 1357-6275.
- S2CID 250650618.
- PMID 20426616.
- ^ "Scientists' Open Letter on Aging". Retrieved 20 April 2015.
- ^ "A Single-Issue Political Party for Longevity Science". Fight Aging!. 27 July 2012. Retrieved 20 April 2015.
- ^ a b Pentaris, Panagiotis (2021). Dying in a transhumanist and posthuman society. Abingdon / New York: Routledge. p. 83.
- ^ ISSN 1357-6275.
- ^ Huberman, Jenny (2022). "Funding Immortality: Making Futures in the Era of Techno-Philanthropy". Études sur la mort. 157 (1).
- ^ Wilson, Ralph F. "Peacock as an Ancient Christian Symbol of Eternal Life". Jesus Walk Bible Study Series. Retrieved 18 January 2011.
References
- Rangdrol, Shabkar Tsogdruk; Matthieu, Richard, tr. (2001). The Life of Shabkar: The Autobiography of a Tibetan Yogin. Ithaca, New York: Snow Lion Publications. ISBN 978-1559391542.)
{{cite book}}
: CS1 maint: multiple names: authors list (link
Further reading
- ISBN 978-0-86418-596-9.
- ISBN 978-0-7382-0761-2.
- ISBN 978-1-4489-3367-9.
- ISBN 978-0-380-79318-1.
- Cave, Stephen (2012). Immortality: The Quest to Live Forever and How it Drives Civilization. Crown. ISBN 978-0-307-88491-6.
- Cullmann, Oscar (1955). Immortality of the Soul or Resurrection of the Dead?. Archived from the original on 26 October 2009.
- ISBN 978-1-57392-130-5.
- ISBN 978-0-230-61729-2.
- ISBN 978-1958061367.
- Elixxir (2001). The Immortalist Manifesto: Stay Young & Save the World. Authorhouse Books. ISBN 978-0-7596-5339-9.
- Freitas Jr.; Robert A. (2002). "Death is an Outrage". Retrieved 14 February 2008.
- ISBN 978-0-312-36706-0.
- Gertz, Sebastian R. P. (2011). Death and Immortality in Late Neoplatonism. Leiden: Brill. ISBN 978-90-04-20717-2.
- Hall, Stephen S. (2003). Merchants of Immortality: Chasing the Dream of Human Life Extension. Boston: Houghton Mifflin. ISBN 978-0-618-09524-7.
- af Hällström, Gunnar (1988). Carnis Resurrection: The Interpretation of a Credal Formula. Helsinki: Societas Scientiarum Fennica.
- Immortality Institute (2004). The Scientific Conquest Of Death. Libros En Red. ISBN 978-987-561-135-1.
- Lehtipuu, Outi (2015), Debates Over the Resurrection of the Dead: Constructing Early Christian Identity, Oxford University Press, ISBN 978-0198724810
- ISBN 0-385-17256-7.
- Perry, R. Michael (2000). Forever For All: Moral philosophy, Cryonics, and the Scientific Prospects for Immortality. New York: Universal Publishers. ISBN 978-1-58112-724-9.
- ISBN 978-1-56025-984-8.
- Rohde, Erwin (1925). Psyche: The Cult of Souls and Belief in Immortality among the Greeks. New York: Harper & Row.
- Salmond, Stewart (1903). The Christian Doctrine of Immortality (PDF).
- West, Michael D. (2003). The Immortal Cell: One Scientist's Quest to Solve the Mystery of Human Aging. Doubleday. ISBN 978-0-385-50928-2.
- Zorea, Aharon (2017). Finding the Fountain of Youth: The Science and Controversy Behind Extending Life and Cheating Death. Westport: Greenwood Press. ISBN 978-1-4408-3798-2.
External links
- "Immortality". Internet Encyclopedia of Philosophy.
- Scientists are Close to Finding a Way to be Immortal
- Turritopsis nutricula:Palscience Meet The Only Immortal Species on Planet Earth
- The Methuselah Foundation Aubrey de Grey's non-profit organization dedicated to finding a cure for aging
- KurzweilAI.net Ray Kurzweil resource site
- BiologicalGerontology.com Chris Smelick's Biogerontology site
- Vitae Institute Chris Smelick's non-profit organization
- ELPIs Theory Marios Kyriazis' theory of human biological immortality
- Immortality Institute Scientific and sociological discussions, activism, research
Religious and spiritual prospects for immortality
- "Death and Immortality" Dictionary of the History of Ideas, etext at the University of Virginia Library
- "Immortality" Immortality – What Will Eternal Life Be Like?
- The Immortality of the Soul and the Resurrection of the Body Lecture by Heinrich J. Vogel
- An Essay on the Scriptural Doctrine of Immortality by James Challis
- Eternity: Christ's Return, Chiliasm, Resurrection of the Dead, Judgment, Hell, Luther on Eternity, Heaven J.P. Meyer, The Northwestern Lutheran, 22 August 1954, Vol. 41, # 17 to 14 April 1957, Vol. 44, No. 8
- "How you Can Have Eternal Life" Jack Graham, PowerPoint Ministries, Crosswalk.com
- Immortality Taoist essay, personaltao.com
- The Trial to Conquer Death Ancient Scientific Yoga – The First Atom's Final Attempt
- Search A review by Dr. Peter Fenwick of the book Human Immortality by Mohammad Samir Hossain
In literature
- Mary Shelley's The Mortal Immortal