We usually tend to interpret stories in themes. Morals offer simple solutions, which don't always work for complex social problems. I think, if there is one lesson to be learned, a moral lies within the Okonkwo's tragic flaw. He had too much pride, hubris, and insecurity. He tried to compensate for his own insecurities by punishing the people, like the killing of Ikemefuna, closest to him. This eventually proves to be his undoing.
Yes