"The economics book reveals the many ideas and schools of economics that have emerged since trading first began in ancient times. It explores Adam Smith's free market thinking in the 18th century, Karl Marz's prediction of the collapse of capitalism in the 20th century, right up to new theories fusing economics and psychology in the 21st century. It answers questions that have intrigued economists the world over. What makes a product valuable? Can we kickstart poor economies by writing off debt? Can we predict and prevent recessions, and what can we learn from the economic depressions of the past?" -- Dust jacket.