The highly influential book by Adam Smith, who brought up the "invisible hand" notion, is titled

A) Freakonomics.
B) The Principles of Economics.
C) The Age of the Economist.
D) The Wealth of Nations.

Invisible Hand

A concept introduced by Adam Smith to describe the self-regulating nature of the marketplace, where individual self-interests inadvertently benefit society.

Adam Smith

An 18th-century Scottish economist and philosopher, best known for his theories on free market economics detailed in "The Wealth of Nations."

Wealth Of Nations

A seminal book by Adam Smith that discusses what builds nations' wealth, often considered the foundation of modern economic theory.