Polycentric interstate federalism among the Yoruba of Nigeria (2022) [pdf]
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https://en.m.wikipedia.org/wiki/If%C3%A1
https://yorubauniverse.blogspot.com/2017/02/datainformation-...
The author's scholarship brought me to it. I was the guest editor of the journal issue in which this article appeared. Here's the scholar's, um, Scholar page: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C44&q=oye.... The author hails from Indiana University's Political Science Dept, which is currently one of the most interesting in the world.
Anyway, my takeaway is that "Polycentric Interstate Federalism" is very similar to what has happened so far with the European Union, and it would be fair to say that it has not been a resounding success.
Did I miss something important? Would you agree?
This is not meant to be prescriptive, it's more so comparative.
Also, I'm not sure Hausa, Fulani, Igbo, or other ethnic groups would be interested in adopting a Yoruba socio-political structure when they already have their own structures in place.
> is very similar to what has happened so far with the European Union
Not exactly, because individual EU states still maintain national sovereignty in just about every single affair.
A better comparison to this would be the evolution of federalism in Italy and Germany in the 19th-21st century.
Or the United States...https://www.jstor.org/stable/48647382