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Couple this with the fact that it is very unlikely that technology and civilisation will keep improving forever, and that there might be some global disaster sometime in the next few hundred thousand years (if we're lucky!) that would severely hit social and healthcare structures, aren't we making loads of problems - potentially insurmountable problems - for people at that time?
Well, with global climate change in the works right now, over population and general environmental degradation, the rapacious use of non-renewable resources, and unfettered genetic engineered consumer crops, I'd say that we may be about to get an answer to this very question. And we may not like the answer.