Dugald Stewart

Dugald Stewart (; 22 November 175311 June 1828) was a Scottish philosopher and mathematician. Today regarded as one of the most important figures of the later Scottish Enlightenment, he was renowned as a populariser of the work of Francis Hutcheson and of Adam Smith. Trained in mathematics, medicine and philosophy, his lectures at the University of Edinburgh were widely disseminated by his many influential students. In 1783 he was a joint founder of the Royal Society of Edinburgh. In most contemporary documents he is referred to as Prof Dougal Stewart. Early life He was the son of Matthew Stewart (1715–1785), professor of mathematics at the University of Edinburgh (1747–1772), and was born in his father's quarters at Old College. His mother was Marjory Stewart, his father's cousin. He was educated at the High School and the University of Edinburgh, where he studied mathematics and moral philosophy under Adam Ferguson. In 1771, in the hope of gaining a Snell Exhibition Scholarship and proceeding to Oxford to study for the English Church, he went to the University of Glasgow to attend the classes of Thomas Reid. To Reid he later owed his theory of morality. In Glasgow, Stewart boarded in the same house as Archibald Alison, author of the Essay on Taste, and a lasting friendship sprang up between them. After a single session in Glasgow University, at the age of nineteen, Dugald was asked by his father, whose health was beginning to fail, to give his mathematical classes in the University of Edinburgh. After three years there, in 1775, Dugald was elected joint professor of mathematics in conjunction with his father. Three years later Ferguson was appointed secretary to the commissioners sent out to the American colonies, and at his request Stewart lectured as his substitute during the session 1778–1779, delivering an original course of lectures on morals. In his early years he was influenced by Lord Monboddo, with whom he corresponded.