That's exactly the question I was asking
Well then, the answer is "none".
And "After the initial period of adjustment" does all the work of carry out your argument
No, it doesn't. Are we talking about the minimum size of a more-or-less steady-state high-tech (hyphen-love!) civilization? or are we talking about the minimum size of a seed population from which a high-tech civilization can reconstruct itself while, presumably, growing in the process?
If it's worth saying, but not worth its own post, then it goes here.
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