Unlike many of Descartes’s other followers, Pierre-Sylvain Re´gis resists the temptations of occasionalism. By marrying the ontology
of mechanism with the causal structure of concurrentism, Re´gis arrives at a novel view that both acknowledges God’s role in natural
events and preserves the causal powers of bodies. I set out Re´gis’s position, focusing on his arguments against occasionalism and his
responses to Malebranche’s ‘no necessary connection’ and divine concursus arguments.