Giammaria Ortes was born in Venice on 2 March 1713. His father, Giacomo, owned a glass manufacture. In 1727 he joined the
Camaldolese order and in 1734 he went to
Pisa, where he studied Mathematics and Philosophy under the guidance of
Luigi Guido Grandi. Ortes left his cloister on the entreaties of his mother after his father’s death, but remained in
holy orders and was ever a strenuous defender of the clergy. It is with this purpose that he wrote his
Errori popolari intorno all’Economia nazionale, his
Lettere sulla Religione and his treatise
Dei fidecommessi a famiglie e a chiese e luoghi pii, with the scope of upholding the existence of clerical property in
mortmain and of refuting the criticism voiced by those
Enlightenment writers who strongly opposed the extended landed properties of the Church. In his
Economia Nazionale (vols. XXI, XXII and XXIII of Pietro Custodi’s
Scrittori classici italiani di Economia Politica, Milan, 1802-1816) Ortes endeavors to demonstrate that as “the wealth of a nation is determined by the (previous) wants of its members, the riches of one of them cannot increase unless at the expense of another one; the bulk of existing riches is in each nation measured by its wants, and cannot by any means whatever exceed this measure” (
Discorso Preliminare). From this rather startling proposition, Ortes, who certainly was an original thinker, deduces the condemnation of the principles on which
mercantilism was based. “
Money is only a sign of wealth, and must never be considered as being wealth itself. The error of those who mistake money for wealth, proceeds from a confusion between the equivalent of a thing and the thing itself, or between two equivalents which they consider as identical things, although they are not” (ch. IX). In his
Riflessioni sulla Popolazione (Venice, 1790, and vol. XXIV of Custodi) Ortes controverts the prevailing opinion that an increase of population must necessarily increase the wealth of a nation, and maintains that ‘‘in any nation whatever the population is compelled to keep within fixed limits, which are invariably determined by the necessity of providing for its subsistence” (
Prefazione). In his very first chapter he asserts that, if natural instincts were allowed full play, population would increase in a
geometrical progression (doubling every 30 years), and calculates that a group of 7 persons composed of three old people, two young men and two young women of 20, would be the ancestors at the end of 150 years of 224 living persons; at the end of 300 years of 7,168 living persons; at the end of 450 years of 229,376 living persons; at the end of 900 years of 7,516,192,768 living persons. Sheer violence keeps down the numbers of animals within the necessary limits, but among men, “generation is limited by reason” (ch. III), especially by
voluntary celibacy, which affords Ortes an occasion of extolling the provident discipline of the
Roman Catholic Church. Ortes is a harbinger of Malthus; first by his law of the geometrical increase of population, and secondly by the influence which he ascribes to
human reason as a prudential check against
overpopulation. Ortes was a fervent mathematical student, and expresses himself in
algebraical formulae in his
Calcolo sopra il Valore dell’Opinioni umane (vol. XXIV Custodi). In the same work he illustrates his meaning by
curves, which, if not actually traced, are at least minutely described. == Legacy ==