The Economics Inside a Single Pin
At the opening of The Wealth of Nations, Adam Smith gives a famous example: making a pin. If one worker did it from start to finish, he could make only a few in a day; but if the work were split into a dozen steps — drawing the wire, cutting, sharpening, fitting the head — done by different workers in cooperation, output could soar hundreds of times over. With this tiny pin he made clear how the "division of labor" creates astonishing wealth — the secret of modern industrial efficiency hides in this plain example.