What is the main conflict in the novel, Onion John?

The main conflict is centered around Andy and his father, and their differing attitudes toward the value of change. They disagree on how a person can distinguish between coincidence and cause or between the ridiculous and the possible, and they hold opposite opinions concerning a person's right to make independent decisions. In discussing these conflicts, the novel explores the meaning of relationships and communication, self-identity and self-acceptance, and the importance of respecting people who hold very different values and views.