On Liberty

On Liberty (1859) is one of the foundational texts of modern liberal political philosophy. In this influential essay, John Stuart Mill articulates a principled defense of individual freedom against both state authority and the “tyranny of the majority.” Mill argues that the only legitimate reason for exercising power over any member of a civilized society, against their will, is to prevent harm to others—a principle now known as the “harm principle.”

The work defends freedom of thought and expression as essential not only to personal development but also to social progress. Mill maintains that silencing dissenting opinions impoverishes public discourse, since even false views contribute to the clarification and strengthening of truth. He further explores the importance of individuality, arguing that diversity of character and lifestyle is a necessary condition for human flourishing and intellectual vitality.

Balancing utilitarian ethics with a robust commitment to civil liberties, On Liberty addresses enduring questions concerning freedom of speech, limits of governmental power, social conformity, and moral autonomy. The text remains central to debates in political theory, constitutional law, and democratic governance.