Although the exact date of Smith's birth is unknown, his baptism was recorded on 16 June 1723 at Kirkcaldy.A Scottish moral philosopher and a pioneer of political economy. One of the key figures of the Scottish Enlightenment, Smith is the author of The Theory of Moral Sentiments and An Inquiry into the Nature and Causes of the Wealth of Nations. The latter, usually abbreviated as The Wealth of Nations, is considered his magnum opus and the first modern work of economics. Adam Smith is widely cited as the father of modern economics.