The main idea expressed in To Kill a Mockingbird is the importance of treating all people well, regardless of race, class, or difference.
As Scout matures, her coming of age is an eventful one. Her childhood consists of trying to make Boo Radley come out, understanding why people insult her father for defending a black man, and appreciating why it’s okay to let Walter Cunningham poor syrup over his dinner.
After an altercation with her new teacher Miss Caroline, Atticus gives Scout an important piece of advice.
You never really understand a person until you consider things from his point of view … until you climb into his skin and walk around in it." (ch 3)
This is the main idea expressed in the book. Boo Radley should not be targeted for ridicule because he does not like to come out of the house. Tom Robinson should not be convicted of raping a white woman just because he let her go near him and felt sorry for her. Even poor people like Bob Ewell have an obligation to behave humanely and honorably, like the Cunninghams. Most importantly of all, not everyone is a bad person. For every Bob Ewell, there is a Miss Maudie. You need to make your role models the people who really behave as you should.