Much of this movie revolves around the real life attempt by humans to explain evil. It is no accident that the childrens' parents represent the extreme sides of the debate: organized religion (pastor) and science (psychiatrist). In both cases, each parent is unable to explain their childrens' evil behaviour, either through psychology or spirituality. The somewhat nihilistic tone of the film is capped off by the fact that it provides no real answers, instead showing that both sides of the debate are unable to explain what evil really consists of, and what motivates the children to act the way they do.