The Nri people of Igbo land have a creation myth which is one of the many creation myths that exist in various parts of Igbo land. The Nri and Aguleri people are in the territory of the Umueri clan who trace their lineages back to the patriarchal king-figure Eri. Eri's origins are unclear, though he has been described as a "sky being" sent by Chukwu (God). He has been characterized as having first given societal order to the people of Anambra. The historian Elizabeth Allo Isichei says "Nri and Aguleri and part of the Umueri clan, [are] a cluster of Igbo village groups which traces its origins to a sky being called Eri."
Archaeological evidence suggests that Nri hegemony in Igboland may go back as far as the 9th century, and royal burials have been unearthed dating to at least the 10th century. Eri, the god-like founder of Nri, is believed to have settled the region around 948 with other related Igbo cultures following after in the 13th century. The first Eze Nri (King of Nri) Ìfikuánim followed directly after him. According to Igbo oral tradition, his reign started in 1043. At least one historian puts Ìfikuánim's reign much later, around 1225 AD.
Each king traces his origin back to the founding ancestor, Eri. Each king is a ritual reproduction of Eri. The initiation rite of a new king shows that the ritual process of becoming Ezenri (Nri priest-king) follows closely the path traced by the hero in establishing the Nri kingdom.
E. Elochukwu Uzukwu

The Kingdom of Nri was a religio-polity, a sort of theocratic state, that developed in the central heartland of the Igbo region. The Nri had seven types of taboos which included human (such as the birth of twins), animal (such as killing or eating of pythons), object, temporal, behavioral, speech and place taboos.The rules regarding these taboos were used to educate and govern Nri's subjects. This meant that, while certain Igbo may have lived under different formal administration, all followers of the Igbo religion had to abide by the rules of the faith and obey its representative on earth, the Eze Nri.