The work entitled Physiocratie, ou Constitution naturelle du gouvernement le plus avantageux au genre humain is not a single continuous treatise by François Quesnay in the ordinary sense. It is a collection edited by Pierre-Samuel Du Pont de Nemours that gathers several of Quesnay’s central writings and presents them as a statement of physiocratic doctrine. Quesnay is therefore the author of the core texts, but the volume itself is a composite work with editorial framing. Its unifying argument is that human society should be governed according to a “natural constitution” discoverable by reason, and that the form of government most advantageous to mankind is one that secures property, liberty, and the primacy of agriculture.
The collection’s central political and legal text is Quesnay’s Le Droit naturel. It sets out the idea of a natural order that precedes and limits positive law. Human beings have natural rights and corresponding duties, and society and government ought to conform to those requirements. The text is not a defense of arbitrary power. Its notion of “legal despotism” is the idea of a sovereign authority that is absolute precisely in enforcing the natural laws, not in acting according to mere will. The “constitution naturelle” of the title is therefore not a written constitution or a constitutional mechanism in the modern sense; it is the natural order of society and government that reason can discover and that legislation should reflect.
The economic core of the volume lies in Quesnay’s physiocratic analysis of wealth, production, and circulation. Agriculture is treated as the productive sector par excellence: it is cultivation of the land that yields a net product after the costs of production and the advances needed for farming have been recovered. Manufacture and commerce are described as “sterile” not because they are useless or morally inferior, but because they transform, transport, or exchange wealth rather than generating a new surplus from the land. The volume consequently argues that economic policy should favor agriculture, large-scale and well-capitalized farming, security of property, and the improvement of land. The prosperity of the whole society depends on the size and circulation of the agricultural net product.
This doctrine is elaborated in the Analyse de la formule arithmétique du Tableau économique, which explains Quesnay’s Tableau économique. The Tableau is an attempt to represent the annual reproduction and circulation of wealth as a system of flows among social classes. It distinguishes the productive class, engaged in agriculture; the proprietary class, especially landowners, who receive revenue and spend it; and the sterile class, comprising artisans, manufacturers, merchants, and others who work on or circulate wealth without creating a net agricultural surplus. The analysis traces how expenditures, revenues, and advances circulate between these classes and shows the conditions under which the economy reproduces itself. It also indicates how taxation, consumption patterns, or restrictions on trade can disturb that circulation and reduce the net product.
The collection’s policy principles are concentrated in Quesnay’s Maximes générales du gouvernement économique d’un royaume agricole. These maxims treat the economic government of a kingdom as a matter of conforming public policy to the natural order. They emphasize the security of property, the encouragement of agriculture, the maintenance of free and easy commerce, especially in agricultural produce, and the avoidance of burdens that fall on the advances of cultivation. Taxation should, on this view, be levied on the net product of land rather than on the costs and instruments of production, since taxing advances or consumption would weaken reproduction. The maxims also oppose monopolies and arbitrary restrictions and favor conditions in which agricultural surplus can circulate and be exchanged freely.
The volume also includes shorter Quesnay texts on commerce and on the labor of artisans, which reinforce the same theoretical framework: commerce and industry are necessary and useful, but they are not the source of the net product; they depend on the surplus generated by agriculture. The collection as a whole thus presents physiocracy as a science of natural order applied to government: the sovereign should secure property and liberty, allow the natural circulation of wealth, tax the net product rather than the productive advances, and orient policy toward agriculture as the foundation of national prosperity. Its aim is not merely technical economic reform but the alignment of government with what it presents as the natural constitution most advantageous to mankind.
Beyond the circulation diagram, the volume develops a political theory of the “natural constitution.” Its natural-right essays treat property, liberty, and security as prior to positive legislation; the fundamental law of society is the preservation of these rights, and sovereign power is legitimate only as their guardian. This yields the collection’s distinctive idea of legal despotism: because the laws of the natural order are held to be evident, the sovereign should enforce them absolutely and uniformly, but must not substitute arbitrary command for them. Authority is thus conceived as tutelary and bound by natural law rather than as a matter of bargaining or caprice. The collection’s discussion of Chinese government serves as an illustration of a sovereign order in which agriculture and natural law are publicly upheld.
The Tableau’s argument depends on a capital-theoretic distinction between original advances and annual advances. Cultivation must first renew its advances and subsistence; only what remains is net product. The sterile class’s purchases and sales are necessary to give the product a market and to return money to the productive class, but they do not create the surplus. The “arithmetic formula” presents reproduction as a circular flow, so that a disturbance in one expenditure stream propagates through the whole. This is why the collection links tax policy, consumption, and trade rules to the size of the net product: a tax or restriction that lands on advances, or that lowers the price of farm produce, can shrink the surplus and the fund from which revenue, subsistence, and advances are renewed.
The Maximes develop this into a program of “bon prix” and free exchange. Agricultural produce must command a price sufficient to cover advances and yield a net product; free commerce, including foreign trade in grain, is valued because it widens the market and helps establish that price, while monopolies and arbitrary regulations distort it. The single tax on land revenue follows from the same logic: since the net product is the only true surplus, taxes should be drawn from it directly rather than from the advances, wages, or consumption that sustain reproduction.
The shorter texts on artisans and commerce sharpen the distinction between wealth and productivity. Artisans and merchants are necessary to prepare, transport, and exchange goods, and their activities can be lucrative; but in the physiocratic accounts they are “sterile” in the specific sense that their labor does not yield a surplus over the advances and subsistence they consume. Their usefulness is real, but derivative: they depend on the expenditure of agricultural revenue and on the productive class’s demand. The book’s originality is systematic: it makes the circular flow of wealth the test of policy and presents political authority as legitimate only insofar as it conforms to that flow’s natural conditions.
