Semiotics: The Tractatus de Signis of John Poinsot

We name this a seminar in “semiotics”, and so one might expect that it concerns thinkers and issues raised no earlier than the late 19th or early 20th centuries, at which time Charles Sanders Peirce (10 September 1839—1914 April 19) retrieved the term from its neglected proposal in John Locke’s Essay Concerning Human Understanding. But—while certainly we will be concerned with many of the issues that preoccupied Peirce and his successors—we find their genesis not in the twilight of modernity, but the twilight instead of the Latin Age. For Peirce was inspired in much of his thinking by the Conimbricenses, a 16th-17th century semi-anonymous group of Jesuit scholars who wrote extensively and profoundly on signs. These same Conimbricenses were, moreover, the teachers of João Poinsot, variously known also as Juan de S. Thoma, Joannes a Sancto Thoma, John of St. Thomas, or, in our usage here, John Poinsot (9 July 1589—1644 June 15).

Poinsot, who took the religious name Joannes a Sancto Thoma upon entering the Dominican Order in 1610 to signify his fidelity to the great saint’s thought, died just six years before René Descartes (31 March 1596–1650 February 11) and yet, despite a much greater profundity of thought and insight, has remained relatively unknown (at least when compared to his French counterpart). Indeed, where Descartes began in earnest the Modern Age of philosophy, with its characteristic Way of Ideas, Poinsot brought to a close the Latin Age. Their relative fame and obscurity to history follow from complex causes. One of these, no doubt, is that while Descartes wrote short and accessible texts, Poinsot crafted both a Cursus Philosophicus and an (incomplete) Cursus Theologicus—each many thousands of pages.

Within this Cursus Philosophicus we find a textually-dispersed but nevertheless conceptually-united Tractatus de Signis, a Treatise on Signs [required]. This treatise has been extracted, arranged, translated, and editorialized in an edition by John Deely (26 April 1942—2017 January 7), first published in 1985 and again in 2013. A careful examination of this text reveals that, while Poinsot may have been the “evening star” of the Latin Age, he proves also the “morning star” of the new, genuinely post-modern era, the Age of Relation. In this seminar, we will study this Tractatus de Signis with close attention. Access to the seminar begins on 18 March 2023.