Adam Smith's "An Inquiry into the Nature and Causes of the Wealth of Nations" is a landmark work that was first published in 1776. In this book, economist Adam Smith examines the principles of the economic system and looks for the reasons for the wealth of states. He develops the concept of a free market and the impact of competition on the country's economy. The author examines various aspects of economic development, revealing the influence of factors such as labor, capital and trade on the state of the economy. Adam Smith's book became an important source for the development of classical economic theory and has a huge influence on the further development of economic thought.