Hello. You did not inform the topic to which you selected what makes it impossible for your question to be answered accurately. In the meantime I will try to help you in the best possible way.
Katies trunk has as main theme the representation and intolerance that the legalists suffered during the American revolution. In this case, we can infer that the author wanted to send a message about intolerance to people with different opinions, who are often massacred and denied by their own people, mainly in America, where freedom of opinion must be encouraged.
