Every day, new clues show that Igbos were indeed the First Men on earth. Read this passage culled from an article in Vanguard.
According to Igbo oral history, Eri was the father of all humanity, created in swamp and whose first food was Yam and palm oil.
This tarries with natural sciences that purports that Man had to evolve in a swampy environment that would have had both freshwater and saltwater, to provide the salts necessary in our physiological development.
A 2013 study at Kyoto University, Japan proves the ‘Wild Yam Question’ that purported that the first humans survived on picking wild Yams – H. Yasouka 2013. The Volta-Niger ethnolinguistic subfamily culture and festivals are tied around Yam festivals.