Sebastiano Basso

Sébastien Basson, Latinized as Sebastianus Basso, was a French physician and natural philosopher of the early seventeenth century. He proposed an early matter theory based on both atoms and compounds, and is recognized as an atomist who independently developed the concept of 'molecule'. His natural philosophy integrated Italian Renaissance naturalism, alchemy, and Calvinist theology. Born in the Metz region of Lorraine around 1573, Basson studied philosophy at the Jesuit academy of Pont-à-Mousson. The location of his medical doctorate is unknown, and there's no record of his medical practice. He converted to Calvinism before 1610 and married in Lausanne, Switzerland. From 1611 to 1625, he held a rhetoric position at the small Calvinist academy in Die-en-Dauphiné. In 1620, he faced a theological tribunal in Geneva for his anti-Aristotelian treatise, the publication of which had been halted by censors. After growing academic conflicts in Die, he departed in anger in 1625. His subsequent whereabouts and the date of his death remain unknown. Basson's major work, *Philosophiae naturalis adversus Aristotelem libri XII* (1621), directly opposed Aristotelian natural philosophy, particularly its concept of continuous magnitude. This work is seen as a significant expression of the emerging 'new conception of nature' in early 17th-century Europe, alongside the contributions of figures like Francis Bacon and Galileo Galilei. Basson posited that atoms could combine as 'mixta' within an ether, not a void, and rejected Aristotelian teleology in causation. While contemporary elemental theories favored five principles, Basson rejected earth and water, adhering to three Paracelsian principles. He disputed the theory of 'compounds' as mixtures possessing properties not inherent in their atomic constituents.