What are the motifs in A Man of the People by Chinua Achebe?

In this country, it is acceptable for men to marry several wives, and this has a profound effect on the relationship between men and women. Chief Nanga’s wife is loyal and supportive, but she is unable to stop her husband from planning to marry a younger, better educated second wife as a showpiece. The narrator, Odili, describes how his father marries far too many wives and has more children than he can support. The first wife in this household, called “Mama,” is looked up to by all the others, and each wife is expected to be kind to the children of the other wives.