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A comment on Is Aging Inevitable?. Parent comment

Re:Is Aging Inevitable? by adrianN on Monday July 26, 2021 @01:56AM (#27956147)
If even if we manage to colonize other worlds, exponential population growth can't be sustained. The habitable space scales at most as the volume of a sphere growing and light-speed centered around Earth, so subexponential. You'd also need to constantly ship people from inner space to ever more distant new colonies.

Fortunately humans seem to have the tendency of having fewer children as they become more wealthy and educated. Many countries already are below replacement rate. It is plausible that birth rates would drop even further if death became optional.

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Re:Is Aging Inevitable? by bpodgursky on Monday July 26, 2021 @02:00AM (#27956176)
If you truly cured death you'd have to worry about the exponent eventually, but realistically people would start pushing back childbearing even further (dramatically further potentially).

And it's possible that the TFR for any individual would not increase meaningfully (not clear to me that a 300 year old would feel the need to continue having children). Could just have 2.1 children and then call it quits and enjoy your great-great-great grandchildren, in which case population growth is only linear, not even exponential.

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