John Stuart Mill 1806 – 1873

John Stuart Mill was a 19th-century British philosopher and political economist, the most influential English-language thinker of the Victorian era. He refined and defended the utilitarian ethics of Jeremy Bentham in his 1863 work Utilitarianism, while On Liberty, published in 1859, gave classical liberal political theory one of its definitive formulations through the harm principle. The Subjection of Women, written with his wife Harriet Taylor Mill and published in 1869, argued for the legal and political equality of women on principled rather than sentimental grounds. He made significant contributions to logic, the philosophy of science, and political economy, and served briefly as a Member of Parliament. Mill's empiricism and inductivism extended the British empiricist tradition into the modern era.

John Stuart Mill (1806–1873) was the most influential English-language philosopher of the nineteenth century. The son of the utilitarian James Mill and a friend of Jeremy Bentham, he was given an extraordinary forced education from infancy — Greek at three, Latin at eight, the Wealth of Nations at twelve — and suffered the famous mental crisis of his early twenties when he came to doubt that the realization of utilitarian goals would actually make him happy.

Mill's mature work attempts to humanize and refine the Benthamite utilitarian inheritance. Utilitarianism (1861) defends the principle of utility while introducing the qualitative distinction between higher and lower pleasures that Bentham had rejected. On Liberty (1859) develops the harm principle and the philosophical defense of individuality and freedom of expression. The Subjection of Women (1869), co-authored in spirit with his wife Harriet Taylor Mill, is one of the founding documents of philosophical feminism. A System of Logic (1843) and the Principles of Political Economy (1848) gave the empiricist tradition its canonical nineteenth-century syntheses.

Mill served as a member of Parliament from 1865 to 1868, supporting women's suffrage and proportional representation. He died in Avignon in 1873. His combination of philosophical liberalism and reform-minded utilitarianism has shaped Anglo-American political and moral philosophy ever since.