The most consequential political commentary coming out of Nigeria this year is not written. It is performed in a red traditional cap and a chieftaincy gown, by a comedian from Enugu State whose alter ego has become a more recognisable public figure than most of the men it parodies. Kevin Chinedu Arua, known across Facebook, Instagram, TikTok and YouTube as Kevinblak, created the character of Governor Amuneke almost by accident. What began as light social commentary has grown into the sharpest sustained satire of political power on the African internet, and it now reaches millions of followers across the continent and...