I've got a #book recommendation! Hierarchy in the Forest by Christopher Boehm.

https://www.hup.harvard.edu/catalog.php?isbn=9780674006911

It shows some examples of top-down and bottom-up hierarchy in human and primate societies and how they get maintained. I found it interesting from the perspective of how to maintain egalitarian #anarchist organizations by avoiding certain failure modes.

If you can't afford it and don't have it in your local library definitely don't download it through annas-archive dot org!