The theme of To Kill a Mockingbird by Harper Lee is you should not judge anyone. The reader notices that the characters are judging each other. “I think there’s just one type of folks. Folks” (304). The quote is saying that everyone is equal no matter your race, religion, or culture. Lee shows us how people judge people by their families. “So you brought that dirty little sister of yours, did you?” (141). Lee points out that judging people by whom they are related to, is wrong. Judging someone by their families past is not right by any means. Finally Lee explains that judging someone by what they have done in the past doesn't reflect on who they are today. “Mrs. Dubose was a morphine addict” (147).