DRAFT – Forthcoming in M. Favaretti Camposampiero, M. Priarolo, and E. Scribano (eds.), Occasionalism: From Metaphysics to Science, Turnhout: Brepols, in press. 1 Andrea Sangiacomo University of Groningen (a.sangiacomo@rug.nl) Neither with occasionalism nor with concurrentism: the case of Pierre-Sylvain Régis 1 Abstract Seventeenth century natural philosophy tends to be highly critical of Aristotelianism and seems to create ideal conditions for a revival of occasionalism. In this Chapter I discuss how the leading Cartesian Pierre-Sylvain Régis advanced an account of secondary causation able to resist occasionalism without reviving already established scholastic accounts of secondary causation developed by Thomists and Jesuits between fifteenth and sixteenth centuries. Keywords Causation, Concurrentism, Occasionalism, Régis 1 This paper is part of the VENI research grant “Occasionalism and the secularization of early modern science: Understanding the dismissal of divine action during the scientific revolution” funded by the Netherlands Research Council (NWO) and based at the Faculty of Philosophy at the University of Groningen.