Magis morale quam mathematicum. L’attestation volée (mai 1705 – mars 1706). Magis morale quam mathematicum. The Purloined Attestation (May 1705 – March 1706)

Abstract

During the querelle des infiniment petits Leibniz wrote several texts addressed to Parisian savants to justify the use of the differential calculus, but only three of them were made public. One of the three, the “Sentiment de Monsieur Leibnitz”, was published without authorization in 1706 at the peak of the quarrel, together with the writings of other mathematicians united in the defence of the new calculus ( Joseph Saurin, Jacob Hermann and the Bernoulli brothers). However, Jean-Paul Bignon, director of the Académie Royale des Sciences, confiscated the prints. All copies of this publication were assumed to be lost, but we have recently identified one copy of it in the British Library catalogue. In this article, we analyse the “Sentiment de Monsieur Leibnitz” by contextualizing it not only from an epistemological approach but also from a political perspective. We will examine the institutional issues at stake by relying on recently published correspondence.