Eze Nri - The Prince of Peace by Emeka Maduewesi

Before Christ came, there was Eze Nri, the Priestly Igbo King, who preached peace to Ndigbo. This was the speech the then reigning Priestly King made in 1913 lamenting that since "government" came, everything has spoiled.
 
Because succeesive Eze Nri's preached peace, Igboland grew in population. No town lorded it over the other, and no kingdoms existed beyond the borders of any town.

But slavery came upon them, and many, about 3 million of them, were taken into slavery.
The first and second pictures was the speech. The third picture was what the British wrote about him and his jurisdiction.