Racism and justice
The novel’s central theme is the legal and social machinery of Jim Crow Alabama. Tom Robinson’s trial is structured to look fair - Judge Taylor is competent, Atticus is diligent, the Ewell case falls apart under cross-examination - yet the verdict is pre-written by race. Lee distinguishes between overt racism (the Ewells, the lynch mob) and "polite" racism (the ladies’ missionary society) to show how the whole social tissue of Maycomb sustains injustice.
Key moments: The trial chapters (17-21); the Missionary Society tea (ch. 24); Atticus’s closing speech; the night at the jail (ch. 15).
”it’s a white man’s word against a black man’s, the white man always wins.”