brahmin wrote:yitwail wrote: and there's no reason to expect it to be vital now, unless something happened in the last 50 years that makes it vital.
that vital something is called "satellite communication, imaging and navigation"
those may be necessary for the
preservation of civilization, but are they sufficient for its
advancement? as chai tea says, a definition of advancement is probably in order. in a sense, there can't be advancement without preservation, but i'm not sure that makes satellite technology
vital. in the long term, there will be a super volcano explosion, either at Yellowstone or Lake Toba in Sumatra, and the ensuing catastrophe will be of the same magnitude as an asteroid impact. space colonization may be the only countermeasure to a disaster of that magnitude, but civilization could keep advancing right up to the moment it happens, and so something could be vital for preservation and yet in no way hinder advancement by its absence.