John Stuart Mill (1806-1873) was a British philosopher, political economist, and civil servant who made significant contributions to the field of political philosophy and economics. One of the foremost thinkers of the 19th century, his work has influenced intellectual discourse and political theory to the present day. Mill's autobiography, titled 'Autobiography' (published posthumously in 1873), provides a deep insight into his life, intellectual development, and the profound influences that shaped his theories in utilitarianism and liberalism. In 'Autobiography,' Mill recounts his rigorous childhood education under the supervision of his father, James Mill, which laid the groundwork for his later philosophical works. As an author, Mill is best known for his seminal texts such as 'On Liberty' (1859), where he advocates for individual freedom and liberty of expression against the tyranny of the majority, and 'Utilitarianism' (1861), where he continues the ethical theories of Jeremy Bentham and defends the utilitarian approach against criticism. Mill's literary style is marked by clarity, systematic argumentation, and the deep conviction of his utilitarian principles. His body of work encompasses diverse subjects from economic theory in 'Principles of Political Economy' (1848) to women's rights in 'The Subjection of Women' (1869), indicating his profound belief in human progress and equality. Mill remains a central figure in discussions on liberty, justice, and moral philosophy.