Редактирование: Arguments against life extension (раздел)

=== Specific issues ===
* '''[[Dehumanisation]]''' caused longevity is a cultural trope often featuring beings like [[Frankenstein]]'s monster and [[Dracula]]. 
* '''[[Naturalistic fallacy|Unnatural]]''' and many people may not consider [[aging as a disease|aging is a disease]]. The [[Life Extension Advocacy Foundation]] makes a number of extended arguments debunking increased lifespans as unnatural.<ref>[https://www.leafscience.org/unnatural/ Unnatural / Playing God]</ref>
* '''[[Involuntary immortality]]''' exists both in fiction such as the Struldbrug<ref>https://en.wikipedia.org/wiki/Struldbrug</ref> from Gulliver's Travels, the character of Jack Harkness<ref>https://en.wikipedia.org/wiki/Jack_Harkness</ref> in Dr Who, and the eternals in the film [[Zardoz]].<ref>https://en.wikipedia.org/wiki/Zardoz</ref> The ideas is also associated with being kept alive on life support against one's consent and/or opposing euthanasia. It is to counter these misconceptions that term [[indefinite lifespan]] is sometimes preferred over 'life extension'. The naturalistic fallacy would typically reject [[aging as a disease]], despite its [[Aging a cancer|similarities to cancer]].
* '''Eternal boredom''' is a scenario many imagine when asked to consider significantly longer life spans. Once again, the association is likely with the inactive low-energy lifestyles of the most elderly rather than a thoroughly considered position. It should be considered that, should boredom arise, it should be preferrable over pain, suffering and permanent disability as a result of aging.
* '''Personal development stagnation''' will radically alter how we view childhood, adolescence, starting a career and social advancement in a world of highly long lived people. Without obvious milestones of having children or inevitably advancing to the top of one's career, some may find this disconcerting.
* '''Loss of mental functions''' such as via various forms of dementia are often perceived as unavoidable in the ageing process. As such, the idea of living longer and fading away is a highly unpalatable idea. Terms such as [[rejuveneering]] are often selected to make it clear such issues are being addressed
* '''Loss of physical functions''' on the other hand, is there much point being in a frail body, or even a brain in a jar without a corresponding healthy physical body? Consequently anti-aging research seeks to not only slow, stop but if desired entirely reverse the ageing process.
* '''Limits of mental capacity''' what happens if an idealised healthy person reaches an unprecedented age such as 150 or even 200? Might they stop learning things, or worse, start forgetting things at random. Such limits are neither understood nor can currently be reliably predicted.
* '''Loss of neuroplasticity'''<ref>https://en.wikipedia.org/wiki/Neuroplasticity</ref> stands at a key intersection of individualistic, technical and social issues. Without ensuring the long term abilities for not only learning, but changing opinions we could end up with a unhappy people living in an unhappy society.
* '''Outliving friends or family''' becoming a person out of time is explored in scifi media, especially with regards to the far future (e.g. [[cryonics]]) or the far past. [[Highlander]]<ref>https://en.wikipedia.org/wiki/Highlander_(film)</ref>) [[Transmetropolitan]] plays up the traumatic natural of adapting to the future, whereas [[Futurama]] mostly plays it down.
* '''Resources best spent elsewhere''' for those who may believe in the technical credibility of life extension technology and even its desirability for others, there will be always be calls for investment and research to be spent on arguably more pressing matters. Be it investing into green energy, addressing present day inequality or even hurrying to [[space exploration|explore space]], living longer is simply not at the top of many people's agendas. The [[Transpolitica]] project around the [[longevity dividend]] attempts to illustrate the economic benefits of such investment to counter this position.
* '''Against God's will''' The [[Religion and transhumanism|religious position]] is typically one of ambivalence and caution from varying religious demoninations.<ref>[http://www.pewforum.org/2013/08/06/religious-leaders-views-on-radical-life-extension/ Pew: Religious Leaders’ Views on Radical Life Extension]</ref> Some head into [[Conspiracy theories and transhumanism|full conspiracy mode]]. Not to be confused with the broader term, 'playing God' in the sense of opening up new dangerous frontiers of risk in a number of different areas.
* '''Selfish''' critics such as bioethicist [[Leon Kass]] have described life extension as "childish and narcissistic"<ref>https://en.wikipedia.org/wiki/Life_extension#Commentators</ref>
* '''Economic collapse''' many are already concerned about the ageing population destabilising national social security programmes and variables that may exacerbate this
* '''Immortal dictators or elites''' [[Immortality in fiction|In fiction]], elites such as in [[Jupiter Ascending]] kill billions to gain additional years of life in a rather inefficient process. In real life however, there are many existing disliked long lived individuals such as [https://en.wikipedia.org/wiki/Rupert_Murdoch Rupert Murdoch] or [https://en.wikipedia.org/wiki/Robert_Mugabe Robert Mugabe] to whom awaiting for them to naturally die of old age is the hope held by many. The need for 63 year old [https://en.wikipedia.org/wiki/Vladimir_Putin Vladimir Putin] to constantly be portrayed performing outdoorsy activities is state propaganda signalling for people to be unconcerned for this scenario.
* '''Life extensionism as a religion''' Similarly to [[transhumanism as a religion]], religions have offered immortality since the dawn on civilisation. Why should advocating the same with technology be given any additional credibility?
* '''Social stagnation''' Social issues are constantly evolving across society and one of the variables that sustains it is the young challenging the old and the best new ideas inevitably rising to prominence. Without ageing and death, this entire process is called into question. Even the field of science could be jeopardised, if science no longer advances one funeral at a time.<ref>[https://www.bloomberg.com/news/articles/2017-10-10/science-advances-one-funeral-at-a-time-the-latest-nobel-proves-it Science Advances One Funeral at a Time. The Latest Nobel Proves It]</ref>
* '''Increased inequality''' The tendency of the rich and the old to effectively consolidate riches is countered by two major factors, [[death and taxes]]. Without death, we could head towards a [[Gerontocracy]]<ref>https://en.wikipedia.org/wiki/Gerontocracy</ref> and the long term power of existing power structures given further power. For people concerned about even existing inequalities, this is a highly concerning scenario.
* '''Overpopulation or population controls''' Whilst [[life extension and overpopulation risk|overpopulation risk]] may be exaggerated, the continual belief in a population crisis has convinced many that this would be environmentally destructive or cause a draconian response such as restrictions around human reproduction.<ref>[http://www.wired.co.uk/article/time-to-restrict-human-breeding It's time to consider restricting human breeding]</ref> Whilst an understanding of the demographic transition is key,<ref>https://en.wikipedia.org/wiki/Demographic_transition</ref> wider definitions of 'overpopulation' need to be considered when countering this position.<ref>http://pirate.london/2017/01/deconstructing-overpopulation-for-life-extensionists/</ref>
* '''Environmental sustainability''' Some [[dark green]] positions are so concerned about the world's population's impact on the environment, they would seek to reduce the population rather than do anything to increase it.
* '''Investment in life extension not cost-effective or credible''' Critics of projects such as [[SENS]] include [[Jason Pontin]] who's $20,000 [[SENS Challenge]] to discredit the initiative failed publicly. None the less, many scientists in the field of biogerontology are sceptical of such organisations.<ref>[https://www2.technologyreview.com/sens/ Is Defeating Aging Only a Dream?]</ref> [[Arguments against cryonics|Cryonics has its own issues]].
* '''Fundamental limits of biology''' Some scientists suggest that hard biological limits may be at play, preventing significant returns on research. The idea of a 'age limit' of around 115 has be touted, but only in the context of without advanced medical intervention as advocated.<ref>[http://www.nature.com/news/human-age-limit-claim-sparks-debate-1.20750 Human age limit claim sparks debate]</ref>
* '''Technological road map not credible''' Specifics of programmes such as Strategies for Engineered Negligible Senescence<ref>https://en.wikipedia.org/wiki/Strategies_for_Engineered_Negligible_Senescence</ref> are disputed by various bioscientists. [[Arguments against cryonics|Cryonics has its own issues]].
* '''Germ line and emergent issues''' Complexities of human biology mean we never effectively fight all the processes of ageing in combination. The end of death may lead of the end of natural human evolution and eventual extinction.
* '''Cosmic inevitabilities''' such as the march of [[entropy]] towards the heat [[death]] of the universe and other cosmic [[existential risk]]s may weaken immortalist and therefore life extensionist arguments.