Invisible Hand Theory
"An Inquiry Into the Nature and Causes of the Wealth of Nations," also shortened as "The Wealth of Nations," documented industrial development in Europe. While critics note that Smith didn't invent many of the ideas that he wrote about, he was the first person to compile and publish them in a format designed to explain them to the average reader of the day. As a result, he is responsible for popularizing many of the ideas that underpin the school of thought that became known as classical economics.