Find in Michigan shows the extent of ancient Native American agriculture

>The ancestral Menominee community that built the agricultural system uncovered by this new research, however, seems to have been less populous and hierarchical than a place like Cahokia, showing that large-scale agriculture may have been a part of life in very different kinds of societies.

Though takes like the above are speculative, and no doubt biased by political values (which I share), still this is support for the view that agriculture does not imply hierarchy, and more generally, different types of scaled societies are possible.