It's an poltical sociology paper. It's narrowly observing the federal clan system among the Yoruba ethnic group.

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.