Adam Smith 
An Inquiry into the Nature and Causes of the Wealth of Nations. Illustrated 

The Wealth of Nations, is the magnum opus of the Scottish economist and moral philosopher Adam Smith.
By reflecting upon the economics at the beginning of the Industrial Revolution, the book touches upon such broad topics as the division of labour, productivity, and free markets.
The Wealth of Nations is the second most cited book in the social sciences published before 1950, behind Karl Marx's Das Kapital. 

About the author

Adam Smith (1723 – 1790) was a Scottish economist, philosopher, pioneer of political economy, and a key figure during the Scottish Enlightenment.