‘With brain preservation, nobody has to die’

Desirability of Immortality

• Many commenters find immortality undesirable or “morally repulsive,” arguing death is integral to life, renewal, and democracy (old elites eventually leave).
• Others strongly want radical life extension, seeing death as a preventable tragedy; they liken “death positivity” and resignation to death to outdated coping mechanisms now that escape might be possible.
• Some distinguish “immortality” from “ending aging”: extended healthy lifespan is seen as good; literal eternal existence (heat‑death of the universe, infinite boredom/loneliness) is not.

Inequality, Power, and Social Effects

• Persistent concern that only the ultra‑rich would access brain preservation, entrenching power for centuries (e.g., “300‑year‑old dictators”).
• Counterpoint: we already tolerate large inequalities; technologies often diffuse over time.
• Some argue long‑lived elites would stall scientific and political progress; others say this isn’t empirically clear and that people matter more than abstract “progress.”

Population and Resources

• Critics worry that near‑immortality plus reproduction would overshoot finite planetary resources and demand draconian birth control.
• Others respond that fertility usually falls with security and that solving death is worth tackling any resulting demographic problems.

Personal Identity & Consciousness

• Intense debate over whether uploads or preserved brains would still be “you” vs. mere copies.
• Many emphasize continuity of subjective experience; a copy surviving does not help the original consciousness that dies.
• Others argue continuity is already illusory (sleep, anesthesia, neural turnover); a perfect functional copy is effectively the same person.
• Thought experiments invoke teleporters, cloning, gradual neuron‑by‑neuron replacement, and “ship of Theseus” style transitions.

Technical Feasibility & Neuroscience Limits

• Neuroscientists in the thread stress we’re nowhere close to mapping or simulating a human brain at the required resolution.
• Open questions include: necessary level of abstraction; roles of synaptic proteins, neuromodulators, gap junctions, electric fields; and how to capture ongoing activity (“software”) as well as structure.
• Brain preservation today is widely labeled speculative or “snake oil.”

Embodiment Beyond the Brain

• Several note evidence that aspects of emotion, decision‑making, and possibly memory are distributed in the body: gut “second brain,” microbiome, non‑neural tissue “mass‑spaced effect.”
• Cases like organ transplants, amputation, and hormones suggest personality depends on more than the cranial nervous system.

Ethics, Autonomy, and End‑of‑Life

• Some prioritize autonomy and dignity over maximal lifespan, rejecting scenarios like brains in vats, extreme disability, or aggressive treatments (e.g., blanket refusal of chemo or amputation), though others call this extreme or insulting to disabled survivors.
• Brain preservation is compared to religious afterlife beliefs: even a false belief might comfort the dying.

Fiction, Thought Experiments, and Culture

• Numerous sci‑fi works are cited (Cyberpunk 2077, SOMA, Altered Carbon, Bobiverse, Pantheon, etc.) exploring uploads, copies as slaves, eternal elites, and torture in digital or cryonic afterlives.
• These stories shape intuitions both for and against pursuing brain‑based “immortality.”