We draw out significant consequences of a relatively popular theory of metaphysical modality—branching actualism—for cosmological arguments for God’s existence. According to branching actualism, every possible world shares an initial history with the actual world and diverges only because causal powers (or dispositions, or some such) are differentially exercised. We argue that branching actualism undergirds successful responses to two recent cosmological arguments: the Grim Reaper Kalam argument and a modal argument from contingency. We also argue that branching actualism affords a response (...) to one popular defense of the classic contingency argument. What results are new difficulties for several cosmological arguments arising from the metaphysics of modality. (shrink)

Joseph Schmid has proposed an account of existential inertia which says (among other things) that each existentially inert object is not ontologically dependent on anything that is not a part of itself. Using this account, I propose an argument that existential inertia cannot be enjoyed by external relations nor by their relata. I first draw from Arianna Betti’s case for relata-specific relations to argue that external relations cannot have existential inertia. Building on this conclusion, I then propose an argument that (...) the relata of external relations also cannot have existential inertia. (shrink)