There are three main themes of “To Kill a Mockingbird”: The Coexistence of Good and Evil: The novel shows the reader the transition of Scout and Jem from innocent children, when they assume that all people are good, to a more adult perspective where they encounter evil, prejudice and hatred.
No coincidence that this novel
has been used as the closest form of required reading by public high schools in America, Oprah referred to it as our "national novel"...