To Kill a Mockingbird is an exploration of human morality, and presents a constant conversation regarding the inherent goodness or evilness of people. Atticus, father of Scout and Jem, also plays the role of teacher, for his children and his town. Atticus believes that people usually contain aspects of both good and evil, but that good will usually prevail. Atticus teaches this to his children, but also to the town, as he works to defend Tom Robinson, an innocent black man accused of raping a white woman.