Going back to Jared Diamond. I kind of remember him theorizing that most of the Native American Populations were killed off in plagues brought by early European visitors and that the societies that the early settlers found were survivors of a catastrophe. Native cultures and civilizations had changed drastically from the time of Columbus to the founding of Jamestown. No one knows what happened to the Mound Builders in the Midwestern states. There is no history there, nothing passed down, they were just gone. Think of what the plagues did to Europeans in middle ages. 50% of the population wiped out from one disease. Now, picture a culture that was ravaged by several different diseases over a period of a few years. Total cultural reset.
There was also a theory I read a few years ago about some of the early migrations from Asia and the reason we can find no evidence is the fact that the land masses were covered in ice and ocean levels were much lower so potential campsites and migration routes along the coast are now covered in water.
I try to practice minimum impact hiking, meaning my trash gets packed out, waste gets buried, no fires are lit outside of fire rings. I try to stay on the trail and walk on rocks if I have to step off the trail.
One of the reasons fires are so frowned upon is that they sterilize the soil and destroy any organic matter. It takes hundreds of years for the campfire site to finally be overgrown. Forest fires, by comparison, are fairly quick and don't sterilize the soil to such a degree.


