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Friday, November 21, 2025

MODULE 6: Radical life extension


Our questions
  1.  Is the human lifespan about the right length, just as is, despite death and disease?
  2. Or would we better off if we could "cancel old age" (as Steele proposes) and make it much longer? 

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Fischer and Cave, Should You Choose to Live Forever?

Living forever (definition, p. 62-69)

  1. True immortality  (not what he's interested in)
    •  impossible to die
  2. Radical life extension 
    • no aging, disease, or internal catastrophes like heart attacks and strokes
    • can still die due to external causes
    • normal lifespan would be about 6000 years
    • rejuvenation & permanent youthfulness
    • Q: will people look different as they get older?
  3. Radical life extension PLUS favorable circumstances
    • resources
    • fellow travelers
Some of these details rule out key problems in our movies

Problem of isolation
  • Age of Adaline, In Time, Man from Earth
  • solved by fellow travelers
  • Q: is it completely solved?

Problem of generation blurring

  • Will Salas's mother appears to be his age (In Time)
  • Adaline's daughter appears to be her mother (Age of Adaline)
  • John Oldman's son appears to be his father (Man from Earth)
  • problem solved by no rejuvenation, no permanent youthfulness
  • Q: is generation blurring actually a problem? 
  • Q: will it be completely eliminated by RLE as specified by Fischer?

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Should we choose RLE under favorable circumstances?

Thomas Nagel's thought experiment (p. 61-62)
  1. If you were offered one more week of life, you would always choose it.
  2. Those extra weeks could add up to 6000 years, if RLE existed.
  3. Therefore, RLE is choiceworthy.
Fischer--this argument is suggestive but sort of cheats -- it circumvents problems with 6000 years by considering them week by week (p. 73)

Compare Thanksgiving Dinner dilemma--should I eat everything on the table? Problem vanishes if you consider the issue bite-by-bite.



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Are there huge problems with living for 6000 years?

Fischer--here are the alleged problems -- but I will show that none of them are serious problems 
  1. Personal identity -- the 6000 year old person one day inhabiting my body won't be me
  2. Death is motivating -- RLE will lead to procrastination
    • What does Fischer say?
  3. Narratives create meaning, and a 6000 year long life will be narratively deficient
  4. Life has stages -- but a super-long life won't have stages
  5. Boredom
Bernard Williams, "The Makropulos Case"
An argument about both personal identity and boredom

  1. To stave off boredom, I will have to shift to one activity after another.
  2. Either I will be unsuccessful, so incredibly bored, so life won't be worth living.
  3. Or I will be successful, but no longer me.
  4. One way or the other, I won't be better off choosing RLE
Next part of book will respond to this