For 10 points, name this work that introduced the concept of the "invisible hand", written by Adam Smith.
This work asserts a connection between the beauty of Irish prostitutes in London and their potato-rich diets; the author also describes a traveler's visit to the Golconda diamond mines. Book III of this work notes that the trade between the country and the city leads a crude product to a more refined state in a section on the progress of opulence, while Book V advances the author's ideas about the proper method of taxation.  However, this work's most important concept is that people working toward their own self-interest will inadvertently provide beneficial effects, such as the division of labor exemplified by a pin factory. For 10 points, name this work that introduced the concept of the "invisible hand", written by Adam Smith.
This work asserts a connection between the beauty of Irish prostitutes in London and their potato-rich diets; the author also describes a traveler's visit to the Golconda diamond mines.
An Inquiry Into the Nature and Causes of The {Wealth} of {Nations}