Why take chemistry stoically? The case of Posidonius

This paper analyzes views of the Stoic philosopher Posidonius (1st century BC) in the light of modern Chemistry. I propose that Posidonius' account on ''generation and destruction'' bears noteworthy similarities to the scientific notions of chemical elements, chemical species, nuclear reactions, and the law of conservation of mass. I find that his views compare favorably also with our understanding of chemical change at solid surfaces. Provided his thought is correctly placed in the cultural context of his day, I argue that Posidonius deserves a previously un-acknowledged consideration in the historical background of modern Chemistry.