"The Wealth of Ideas" is a book that looks at the history of economic thought from ancient times to the present. It discusses different views on the economy and society, focusing on ideas like scarcity, utility, physical costs, and surplus. The book evaluates the foundations of these ideas and how they have evolved over time. Key figures like Adam Smith, Karl Marx, and John Maynard Keynes are highlighted, showing the development of economic theories between subjective and objective perspectives.