This chapter focuses on antecedents of the radical strain in development economics after discussing classical political economic thinkers. The determinants of prosperity and progress identified above resulted for Smith. A in “the full complement of riches” which enabled society to be in a progressive state. The total agricultural product or income is divided between the landlords, capitalist farmers and labor. The marginal unit in cultivation is shown by the vertical supply curve, intersecting the demand curve, which defines the amount of land in use based on the demand for food. Classical political economists understood that challenging property rights meant challenging the existing social system. Marx rigorously formalized theories of profit and exploitation. Since natural economies had no need for the industrial goods of capitalist economies, economic dependence had to be created via artificial means i.e. via the destruction of the natural economies.