There is not to be found in the writers of the early Middle Ages, that is to say from the eighth to the thirteenth centuries, a trace of any attention given to what we at the present day would designate economic questions. Usury was condemned by the decrees of several councils, but the reasons of this prohibition were not given, nor was the question made the subject of any dialectical controversy; commerce was so undeveloped as to escape the attention of those who sought to guide the people in their daily life; and money was accepted as the inevitable instrument of exchange, without any discussion of its origin or the laws which regulated it. The writings of this period therefore betray no sign of any interest in economic affairs. Jourdain says that he carefully examined the works of Alcuin, Rabanas Mauras, Scotus Erigenus, Hincmar, Gerbert, St. Anselm, and Abelard--the greatest lights of theology and philosophy in the early Middle Ages--without finding a single passage to suggest that any of these authors suspected that the pursuit of riches, which they despised, occupied a sufficiently large place in national as well as in individual life, to offer to the philosopher a subject fruitful in reflections and results. The only work which might be adduced as a partial exception to this rule is the _Polycraticus_ of John of Salisbury; but even this treatise contained only some scattered moral reflections on luxury and on zeal for the interest of the public treasury.[1] [Footnote 1: Jourdain, _op. cit._, p. 4.]