The Posidonian Argument

*In this chapter I discuss the reception of a design argument by Cicero in the works of Holbach and Voltaire. This argument was directed against both the system of chance and the system of necessity. The chapter distinguishes three interpretations of this argument: (1) a prima facie interpretation; (2) a ‘neglected’ interpretation and (3) a ‘transcendental interpretation.’ It shows that in the early modern period Cicero’s argument was very widely discussed and its significance was not merely as a design argument; it connected scientific practice, even progress in science, to providential final causes. To show this I focus on Boyle and Locke before turning to Newton. In the final section, I return to Voltaire’s response to Holbach and show how Voltaire adapts the argument and uses Newton.