From: Phlip Date: 2009-04-23T08:10:05+09:00 Subject: Re: Goodbye Ruby - Hello Earth > ok, lets look at history. history is positively strewn with the > shipwrecks of failed civilizations. I'm getting in the habit of reading down to the first misappropriation of sophistry and replying... For every civilization that failed, it grew at a sustainable rate until it created a positive population effluence. For example, in the Sacred Valley region of the Andes, you can count rows of stones - protypical terraces for farming - going all the way from some valley floors to the peaks of their mountains. At one time, those valleys were entirely farmed from bottom to top. And every one of those failures happened because of a change in the climate. Rome collapsed not because of overpopulation or high taxes or Christianity or any historical revisionism like that; it collapsed because a volcano in the India Ocean created a series of long winters. The global agricultural bases collapsed. Historically, civilizations did not collapse because they despoiled their environments. That's a relatively new phenomenon. Oh, and the Inka civilization in the Andes collapsed from a smallpox plague...