Adam Ferguson (Scottish Gaelic: Adhamh MacFhearghais), also known as Ferguson of Raith (1 July N.S. / 20 June O.S. 1723 – 22 February 1816), was a Scottish philosopher and historian of the Scottish Enlightenment.
Ferguson was sympathetic to traditional societies, such as the Highlands, for producing courage and loyalty. He criticized commercial society as making men weak, dishonourable, and unconcerned for their community.
Ferguson has been called "the father of modern sociology" for his contributions to the early development of the discipline. His best-known work is his Essay on the History of Civil Society.
Born at Logierait in Atholl, Perthshire, Scotland, the son of Rev Adam Ferguson, he received his education at Logierait Parish School, Perth Grammar School, and at the University of Edinburgh and the University of St Andrews (M.A., 1742). In 1745, owing to his knowledge of Gaelic, he gained appointment as deputy chaplain of the 43rd (afterwards the 42nd) regiment (the Black Watch), the licence to preach being granted him by special dispensation, although he had not completed the required six years of theological study.
It remains a matter of debate as to whether, at the Battle of Fontenoy (1745), Ferguson fought in the ranks throughout the day, and refused to leave the field, though ordered to do so by his colonel. Nevertheless, he certainly did well, becoming principal chaplain in 1746. He continued attached to the regiment till 1754, when, disappointed at not obtaining a living, he left the clergy and resolved to devote himself to literary pursuits.