Unequal justice refers to the disparity in the application of laws and the administration of justice, where individuals or groups do not receive the same legal protections or consequences due to factors such as race, socioeconomic status, or political influence. This concept is crucial when examining the rise of the Ku Klux Klan and the accompanying racial tensions, as it highlights how systemic biases led to the marginalization and victimization of African Americans and other minority groups during a tumultuous period in American history.