> Well, sure when you exaggerate what I'm saying into 'exhaustive' conversion and a 'complete absence' of megafires it sounds like romanticism.
I merely made what was implicit into explicit; using the term "garden" implies a total control.
> The population density was considerably higher before the arrival of in particular smallpox, for one thing.
I'm not interested in the density over time. Do we know the acres of forest-land per capita and the total area a certain manpower can manage this way? Especially since you scale back to 12k years, I wouldn't be surprised if there are orders of magnitude mismatch between the work-load and the population's capacity.
> West Coast natives in fire country absolutely set fires and managed the forests to make it easier to hunt and prevent as much conflagration as they could
No question they did. Local village populations do this around the world today. "As much as they could" doesn't make it their garden though, nor guarantees that the methodology scales to today's land use practices. As a proof you can look at this month's Mediterranean wildfires in Italy, Greece, Spain and Turkey.
> The romanticism was thinking of North America as a "wilderness" when it had been inhabited for, again, 12,000 years. Humans shape their environments, the indigenous people of this continent were not an exception to this.
Roughly 25% to 45% of the world today is still wilderness depending how it is measured. It was probably 99% 12k years ago (I don't have data on this one).
People shape environments but not uniformly, nor necessarily forever. People being evil destroyers of nature is a last century outlook (and maybe rightly so) but in the times of those indigenous tribes, nature used to be the main adversary of humans, destroyer of populations. The idea of "wild man in harmony with nature" is a new age anachronism by people who probably haven't even camped in the wilderness, at least without a full-spectrum REI gadgetry of 21st century.