Adam Smith, a Scottish economist and philosopher, is renowned worldwide for authoring The Wealth of Nations (1776), an influential work in which he presented two main theories that have since become cornerstones of economics: the division of labor and the invisible hand.
In his book, Smith showed how the division of labor increases the productivity of a given task by having it completed by multiple people instead of just one. Smith explained that, if everyone is assigned different tasks, it will be easier to make a single product faster because each person already knows how to produce a certain component of it. The division of labor is backed by historical examples, such as the case of a pin factory in which a single worker only produces one pin a day, while ten people are able to create 48,000 pins in the same time frame. This notion of economic specialization is still used today to produce large scale consumer goods.
The second major concept of Smiths book is the invisible hand: the markets ability to regulate itself. According to Smith, the competition between traders is necessary to make sure that the prices of goods and services stay reasonable. The hidden driving force behind the invisible hand is the natural self-interest of everyone in the market. Smith argued that when a trader pursues his own profits, he will end up benefiting the whole of society, since prices do not get inflated and everyone can afford what they need. The concept is also used today to explain how market forces can be beneficial for everyone without the presence of governmental or external regulations.
Smiths theories were groundbreaking and continue to be used and further developed centuries later. He was the one who established the core of the school of economics that is still taught in colleges and which formed the basis of the capitalist systems that power many modern countries. Smith was a believer in free-market economics and encouraged the deregulations of the labor industry, which he held as the true driver of economic growth.
The Wealth of Nations was the first of its kind and has since sparked immense debate on the moral implications of capitalist ideologies. Despite this, Smiths contributions to the study of economics remain widely accepted and immortalized in classrooms around the world.