@dalehileman,
I think you remembered it wrong. There is no Christianity in there.
This is what it says.
emigration due to overpopulation.
Religion
The Igbo are a profoundly religious people who believe in a benevolent creator, usually known as Chukwu, who created the visible universe (uwa), and is especially associated with rain, trees and other plants. According to the traditional religion of the Igbo, there is no concept of a gender type such as “man” or “woman” associated with the supreme deity Chukwu.
The Igbo believe in the concept of Ofo and Ogu, which is a governing law of retributive justice. It is believed that Ofo and Ogu will vindicate anyone that is wrongly accused of a crime as long as "his hands are clean." It is only the one who is on the side of Ogu-na-Ofo that can call its name in prayer, otherwise such a person will face the wrath of Amadioha (the god of thunder and lightning). Tied to redistributive justice, Igbo believe that each person has their own personal god ("Chi"), which is credited for an individual's fortune or misfortune.
Apart from the natural level of the universe, they also believe that another plane exists, which is filled with spiritual forces, called the alusi. The alusi are minor deities, and have the capacity to perform good or evil, depending on circumstances. They punish social offenses and those who unwittingly infringe upon the privileges of the gods. In order to commune with the spiritual level of the universe, diviners exist to interpret the wishes of the alusi. The alusi can also be reached through the priesthood, which placates them with sacrifices. Either a priest is chosen through hereditary lineage or is chosen by a particular god for his service, usually after passing through a number of mystical experiences.
Native religious beliefs
Deities
Minor deities claimed an enormous part of the daily lives of the people, due to the belief that these gods could be manipulated in order to protect the population and serve their interests. Some of the most common are:
•Ala – the earth-goddess, the spirit of fertility of man as well as the productivity of the land.
•Igwe – the sky-god. This god was not appealed to for rain however, as was the full-time profession of the rain-makers.
•Imo miri – the spirit of the river. The Igbo believe that a big river has a spiritual aspect; it is forbidden to fish in such deified rivers.
•Mbatuku– the spirit of wealth.
•Agwo – a spirit envious of other’s wealth, always in need of servitors.
•Aha njuku or Ifejioku – the yam spirit.
•Ikoro – the drum spirit.
•Ekwu – the hearth spirit, which is woman’s domestic spirit.
The afterlife
There is a strong Igbo belief that the spirits of one's ancestors keep a constant watch over the living, and must be placated through prayer. Ancestors who had lived well, died in socially approved ways, and were given correct burial rites, were allowed to continue the afterlife in a world of the dead. The world of dead that was filled with honored ancestors mirrored the world of the living, and deceased relatives were periodically reincarnated among the living. The reincarnated dead were given the name ndichie, meaning "the returners." Those who died bad deaths and lack correct burial rites cannot return to the world of the living, or enter that of the dead. They wander homeless, expressing their grief by causing destruction among their living counterparts.
