On Liberty is a philosophical work by the English philosopher John Stuart Mill, originally intended as a short essay. The work, published in 1859, applies Mill's ethical system of utilitarianism to society and the state. Mill attempts to establish standards for the relationship between authority and liberty.John Stuart Mill, (born May 20, 1806, London, England—died May 8, 1873, Avignon, France), English philosopher, economist, and exponent of Utilitarianism. He was prominent as a publicist in the reforming age of the 19th century, and remains of lasting interest as a logician and an ethical theorist.The eldest son of the British historian, economist, and philosopher James Mill, he was born in his father’s house in Pentonville, London. He was educated exclusively by his father, who was a strict disciplinarian. By his eighth year he had read in the original Greek Aesop’s Fables, Xenophon’s Anabasis, and the whole of the historian Herodotus. He was acquainted with the satirist Lucian, the historian of philosophy Diogenes Laërtius, the Athenian writer and educational theorist Isocrates, and six dialogues of Plato. He had also read a great deal of history in English. At the age of eight he started Latin, the geometry of Euclid, and algebra and began to teach the younger children of the family. His main reading was still history, but he went through all the Latin and Greek authors commonly read in the schools and universities and, by the age of 10 could read Plato and the Athenian statesman Demosthenes with ease. About the age of 12, he began a thorough study of Scholastic logic, at the same time reading Aristotle’s logical treatises in the original. In the following year he was introduced to political economy and studied the work of the Scottish political economist and philosopher Adam Smith and that of the English economist David Ricardo.While the training the younger Mill received has aroused amazement and criticism, its most important aspect was the close association it fostered with the strenuous character and vigorous intellect of his father. From his earliest days he spent much time in his father’s study and habitually accompanied him on his walks. He thus inevitably acquired many of his father’s speculative opinions and his father’s way of defending them. But he did not receive the impress passively and mechanically. The duty of collecting and weighing evidence for himself was at every turn impressed upon the boy. His childhood was not unhappy, but it was a strain on his constitution and he suffered from the lack of natural, unforced development.