Adam Smith was a Scottish economist, philosopher, author, and public intellectual, born in Kirkcaldy, Fife, Scotland. He studied at University of Glasgow, Balliol College, and Oxford, and lectured at the Philosophical Society of Edinburgh and Glasgow University. His principal writings are The Theory of Moral Sentiments and The Wealth of Nations. The Theory of Moral Sentiments is a work on moral philosophy, while The Wealth of Nations is a pioneering, revolutionary work on economics.