The founding years of political economy coincided with the birth and the goldenage of modernagronomy. Inthe century that separated Jethro Tull from Justus Liebig and Jean-Baptiste Boussingault—after whom agronomy became applied chemistry—political economy underwent fundamental changes, for this was also the period that separated Richard Cantillonfrom JohnStuart Mill—inshort, almost the entire period of the development of the classical school of political economy...