Magnum opus

The term magnum opus means "Great work," and refers to an artist, writer or composer's best, greatest, or most renowned contribution to their field.

Economic and Classical-Liberal magnum opuses

 * Essai sur la Nature du Commerce en Général, translated as An Essay on Economic Theory (sometimes simply referred to as Essai) (1755) by Richard Cantillon
 * The Wealth of Nations (1776) by Adam Smith
 * Principles of Economics (1871) by Carl Menger
 * The General Theory of Employment, Interest and Money (1936) by John Maynard Keynes
 * Human Action (1949) by Ludwig von Mises
 * Man, Economy and State with Power and Market (1962) by Murray N. Rothbard