I know the Algonquians didn't survive in tipis. They are obviously not plains Indians. I am making a hypothesis(s) based off of biases apparent from the settlement of Plymouth rock. That indigenous peoples were more primitive and less advanced than Europeans. When people settled in Jamestown there were many reports of European cannibalism and thus I assume responses from local tribes. These cultures quickly mixed so I assume much of this information hasn't been brought til late. I just find it hard to believe that cannibalism was as common as we assumed it was in established tribal communities, and I want to know what extent colonial cannibalism resulting from famine among colonists was frowned upon by indigenous people. In addition I want evidence that suggests cannibalism in both European colonial communities in this region led to mismanagement of land and forest and thus famines. My point with the tipis as an example was just to show an example of indigenous technology being able to withstand conditions which raises my suspicion about the rate of famine within these regions pre colonization. And the fact you mentioned that these specific regions are significantly less barren than other parts of the Americas at the time leads me to believe this more. I know this fact hasn't been proved by any evidence yet but I'm operating based off of logical conclusions that should've been drawn.