The term 'theme in 'To Kill a Mockingbird'' can be summarized as RACISM, which is a 6 letter word. RACISM is a major theme in Harper Lee's classic novel, 'To Kill a Mockingbird', which was published in 1960. The novel follows the story of Atticus Finch, a lawyer in the fictional town of Maycomb, Alabama, who defends a black man accused of rape. Throughout the novel, RACISM is explored through the characters' interactions and experiences.