John Stuart Mill (1806–1873) was an eminent English philosopher, political economist, and a civil servant. He was a profound advocate of utilitarianism, an ethical theory developed by his predecessor, Jeremy Bentham. Mill tailored this philosophy to more profoundly accommodate the nuances of moral sentiments and individual rights. His intellectual achievements and contributions span across various fields including logic, epistemology, economics, and social and political philosophy. Mill's seminal work, 'On Liberty', explores the nature and limits of the power that society can legitimately exercise over the individual, a timeless issue of political and moral discourse. His other major works include 'Principles of Political Economy', which established his reputation as a leading public intellectual, and 'Utilitarianism', where he presented a more refined version of utilitarian ethics. 'The Subjection of Women' was a groundbreaking work that argued for equality between the sexes, an unusual stance for a Victorian era philosopher. These works, along with 'A System of Logic' and 'Considerations on Representative Government', collectively showcase Mill's literary and philosophical prowess. They have been collated in compilations such as the 'JOHN STUART MILL - Ultimate Collection', which provides an extensive overview of his broad philosophical trajectory. Mill's writings remain profoundly influential in philosophy, political theory, and economics, and he is widely regarded as one of the most important English-speaking philosophers of the nineteenth century.