Ensuring post-apocalyptic survival at TL8?

[David Johnston2]

Originally Posted by Molokh

In any case, what would be the minimum population (which would be, based on some googling, probably slightly above 200 for genetic reasons, but probably more like 1k+ for other reasons), cash cost, and material requirements of such a project? I.e. to maintain TL7 or even TL8 on the 'new world' in no more than one generation.

Well, Space suggests 50 million people. It would probably be easier to preserve the knowledge for later use than to move enough people to actually maintain the use of TL 7-8 in a start-up colony with no contact with the mother world.