Not a Zero Sum Game

The key to understand how society comes to be, works without central direction, and develops into a thriving civilization can be understood through the least understood idea in economics: the division of labor through comparative advantage. It is central to not only Mises's conception of the social order but also to the entire classical liberal worldview.
 

Principles of Economics by Carl Menger

Principles of Economics ushered in modern economics. Principles not only revolutionized value, price, and marginal utility theories, but it was also used as the primary textbook by several generations of Austrian students and scholars, including Ludwig von Mises and F. A. von Hayek. No economist's library is complete without a copy of this classic work.