"On Liberty" by John Stuart Mill is a seminal work advocating for individual freedom and self-expression against societal norms and governmental control. Mill eloquently argues for the importance of liberty in thought, speech, and action as fundamental to human progress and happiness. He examines the limits of authority, emphasizing the distinction between self-regarding and other-regarding actions. This timeless philosophical treatise champions the sacredness of personal liberty and its crucial role in a vibrant and healthy society.