Abstract

The main focus of this dissertation is the late medieval doctrine of Concurrentism. Concurrentists hold that God is immediately, causally involved in every event in nature, and yet so are creatures: For any natural effect to obtain, both God and creature must make a genuine causal contribution to the effect. Yet the presence of God's immanent activity in nature is claimed to not overdetermine or render otiose the real and necessary causal input of creatures. I develop and defend this view as follows. First, I explain that---for the theist---any proper account of secondary causation can be given only against the backdrop of God's primary causation, which is best described as God's causal providence. Next, I offer a traditional interpretation of the doctrine of creation ex nihilo, one that sharply distinguishes it in kind from ordinary, natural efficient causality or production. Given this interpretation, I argue that simply in virtue of being committed to creation ex nihilo, the theist is thereby committed to a theory of primary causation that I call The Strong View of Divine Providence . SP entails that God must not only sustain or conserve that which He creates, but also act directly in the operations of His creatures, and in the production of their effects. I then employ SP to evaluate the various theories of secondary causation available. Of the three possible contenders---Mere Conservationism, Occasionalism, and Concurrentism---I argue that only the latter two are compatible with SP. I then provide objections to occasionalism, showing how the doctrine either undermines its commitments to both divine providence and human freedom---so is philosophically and theologically unacceptable---or is better categorized as a version of one of the other two theories. Since mere conservationism is ruled out, simply given the conditions of SP, it follows that the most plausible view for the traditional theist to hold is some version of concurrentism. I then offer a positive analysis of concurrentism by explaining why God must concur with creatures, what God's concurrence amounts to, and then describe a simple model to explain how God concurs with creatures