The Imperial expansion of the Oyo Yoruba from the 1600s-1800's destroyed the Yoruba confederacy and ethnic identity. Briefly restored from 1940-1970, the Yorubas experienced major economic gains. Now as Nigeria's unitary system constrains Yoruba identity, the Yorubas have again entered into modern decline.
Stemming Yoruba Decline (II/III): Rise of the Oyos & the end of Yoruba nationhood
Adebayo Alonge 