As a phenomenon that involves the understanding of national wealth, it originates as a discipline in moral philosophy.
Responses on ReviewsBird.com offer answers on the importance of political economy and why people should study it. It involves the examination of production and trade and how they relate to customs, the laws of a nation, and the government of that country. It explores the means of national income and wealth and how nations sustain it.
With the studies and notes from scholars like Adam Smith, Anne-Robert-Jacque Turgot, David Ricardo, François Quesnay, and Thomas Malthus, the discipline was established. It has since then morphed into a branch of social sciences. It concentrates on the relationship between the government, individuals and economic actors, and the public policy of a nation.