Michael Tobis wrote:
> Prioritization is surely a good thing, but I am coming at this from
> another angle.
> 
> There will soon enough be 10G people, of whom perhaps 0.4G will be American.
> 
> If we take sustainability to mean no drawdown of remaining species
> population in the wild, no significant extraction of fossil fuels or
> groundwater, no net large scale changes in composition of atmosphere
> and ocean, can the average American standard of living as of today
> become the global average?
> 
> My intuition says no, it has too much impact, but I am trying to find
> somebody who has done the calculation in earnest, or, failing that,
> sources for the right numbers.

I don't think this is a well-posed question in the first place. No 
fossil fuel extraction but American standard of living already 
presupposes lots of changes to an as-yet purely hypothetical future. If 
we can solve the energy problem (eg via technology), then maybe we can 
solve food and water problems similarly. If we cannot, then there is no 
truly sustainable solution.

So there you have the mathematician's answer - precisely correct and 
utterly useless :-) But more reasonably, of course we are miles off any 
semblance of sustainability by your measure, and will remain so 
indefinitely. Maybe this means your definition is too strict to be 
useful, although of course you can choose any definition you want...

BTW 10 billion people seems unlikely, but I suppose 9 is more than enough.

James

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