@Setanta,
Quote:How can you reasonably say that the environment was improved?
I didn't intend to, at least from any objective standpoint, just that it was managed differently. And I think I still would say that it was managed -- to control the extent and character of various ecosystens, to whatever end, would seem to me to fit the bill as "management."
Quote:Were tribes or bands who did not practice slash and burn agriculture somehow less worthy than those that did? Is this not exactly the sort of attitude that people decry in their condemnation of the European settlers?
No, I certainly wouldn't say that. What interests me more is the difference between using forested land as an ongoing source of food rather than as a one-time (or perhaps once every few decades) source of fuel and building material.
Quote:Why did animal species diversity take a nose-dive in the Americas just as it did at the end of the "ice age" everywhere else if the Amerindians were so environmentally attuned?
Would you hold modern Eurasians responsible for the extinction of Bos taurus in the wild? These events were millennia apart. People change in that time. If I was being romantic, I might even turn that around and suggest that somehow the after-effects of that catastrophic mismanagement might have led to more conscious practices down the road. I doubt that's actually the case, but I don't think it's any less a tenable presumption than that there should philosophical stasis between the retreat of the last glacial maximum the and more or less present day.
As for the "so environmentally attuned" bit, I don't have an image of the Amerindian as a shamanic Steward of the Wild Lands. Reportedly, Indian guides on the Lewis and Clark expedition would set fire to sap-filled pine trees and watch them explode like Roman candles just for the sake of amusement. It is what it is. At the same time, many groups did employ some land use strategies that were likely more sustainable, in their time and place, than many practices in use around the globe today, and I don't think it's folly to at least consider them as models for different approaches we could use today. (I'm cribbing relentlessly from 1491 here, if you want attribution. I'm certainly no scholar in the area.)