This is Prof Subin C. He is the Professor of Economics from G S College. He is doing research in "Financial Crisis: 2018 - 19". This book consists of the Origin of Economics when scientific theories started to develop. So, while reading this book it will help the students of Masters and Ph.D.'s, how the theory is originated, then developed after that and how your theory can be developed. Physiocrats are the group of thinkers who sided agriculture provided Surplus Value, so, trade and industries must be under Free Trade. Their theories are developed by Adam Smith, David Ricardo, Malthus and John Maynard Keynes. So studying this theory is vital for understanding the economic theories developed by Physiocrats.