Some examples in the book include the Wendat people and Teotihuacan. You can also check out the book’s wiki page https://en.wikipedia.org/wiki/The_Dawn_of_Everything.

One of the core conclusions of the book that you may find interesting (quote from the wiki):

Based on their accumulated discussions, the authors conclude by proposing a reframing of the central questions of human history. Instead of the origins of inequality, they suggest that our central dilemma is the question of how modern societies have lost the qualities of flexibility and political creativity that were once more common.

I recommend reading The Dawn of Everything by David Graeber for more details on societal structures of the past