Best known for his revolutionary free-market economics treatise The Wealth of Nations, Adam Smith was first and foremost a moral philosopher. In his first book, The Theory of Moral Sentiments, he investigated the flip side of economic self-interest: the interest of the greater good. Smith's classic work advances ideas about conscience, moral judgment, and virtue that have taken on renewed importance in business and politics.  For more than seventy years, Penguin has been the leading publisher of classic literature in the English-speaking world. With more than 1,700 titles, Penguin Classics represents a global bookshelf of the best works throughout history and across genres and disciplines. Readers trust the series to provide authoritative texts enhanced by introductions and notes by distinguished scholars and contemporary authors, as well as up-to-date translations by award-winning translators.