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13 October 2009

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30 January 2009

  • curprev 09:4909:49, 30 January 2009Michael talk contribsm 4,476 bytes −2 small edits, clarify "some" conditions of sustainable civilizations, not "the" conditions, as the perspective should elucidate some necessary conditions but not claim to have a complete picture

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31 December 2008

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  • curprev 13:2813:28, 12 December 200892.65.198.50 talk 2,608 bytes +105 Removed "As far as we know that would allow for many millions of human generations.", added "civilization in a billion years", clarifed perspective

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