What is the theme in Matilda by Roald Dahl?

Adult-child relationships is the main theme of the book. Every child has relationships with the adults in their lives. In these relationships, it is always the adult who is in control. Adults can use the innate power they have over children in positive ways, or they can abuse it, and both cases are seen in this novel. While Matilda is the clear protagonist in this story, nearly all of the other main characters are adults. Since Matilda is a brilliant and insightful person, she is able to understand the grown-ups in her life better than most other children would.