how does Onkonwo's exile signal questioning of community?

But the beginning of Okonkwo's tragedy is a complete accident. It is a moment of blind chance that drives Okonkwo from his homeland. The greatest loss is more than material: Okonkwo's faith in the power of hard work is shaken. His will and strong arm are unable to prevent this disaster. As a middle-aged man, Okonkwo is being forced to start over again.