Forewarning: this is something of a rant and not carefully argued... Hey, someone with (at least somewhat) similar views. Great to hear from you. I skimmed the other discussion, and regret I didn't see it earlier. I don't worry about an inability to die if you don't like life, and think the population issue isn't so bad by itself (I worry about the disproportionate number of old people (even if healthy) and the rarity of children. But "unknown consequences" weighs very heavily. The status quo bias isn't such a bad thing as a defense against hubris. And while I can't prove it, I think a society where people live to (even) 200 is extreme hubris, playing with fire. Individuals have an incredibly strong motivation to keep themselves alive. If it runs against the common good (which it could in any number of ways) it would be very hard to stop. I'm not sure how LWers got so terribly afraid of death -- usually atheists accept death. And, while I'm at it, I think The Fable of the Dragon Tyrant is one of the most maddening pieces of sophistry around. It could be a textbook case for "kill the enemy" emotional manipulation. I scratch my head at how a group that starts out in search of rationality ended up as starry-eyed transhumanists. But I tend to think that rationality wouldn't really resolve differences related to life extension. It's different probability estimates and different utility curves. So an unpopular view like this gets voted into invisibility, and the community keeps its unanimity. What to do? Probably go off to some other corner of the web of like-minded people, and stop trying to change minds... End of rant.