Arrow of God revolves around competition. We see competition between Ezeulu's wives for his attention; between Ezeulu, the chief priest of Ulu, and Ezidemili, the chief priest of the lesser deity Idemili; between the communities of Umuaro and Okperi; and between Ezeulu's village and Ezidemili's village. But the most important competition is between the god Ulu and the Christian god. This fight is always in the background, and we realize that Arrow of God is an illustration of the saying "When two brothers fight, a stranger reaps the harvest." As the region roils in division, Christianity quietly steps in and takes the respect and place of honor that had previously belonged to the god Ulu.
Even though the people of Umuaro dislike the imposition of white rule and religion, they allow it to have control because of the discord that rules their lives.