The Wealth of Nations by Part 4 Chapter 9 Page 4

commerce, he prohibited altogether the exportation of corn, and thus excluded the inhabitants of the country from every foreign market for by far the most important part of the produce of their industry. This prohibition, joined to the restraints imposed by the ancient provincial laws of France upon the transportation of corn from one province to another, and to the arbitrary and degrading taxes which are levied upon the cultivators in almost all the provinces, discouraged and kept down the agriculture of that country very much below the state to which it would naturally have risen in so very fertile a soil and so very happy a climate. This state of discouragement and depression was felt more or less in every different part of the country, and many different inquiries were set on foot concerning the causes of it.