Is Shepherd a Monist?

For Shepherd, how many things exist? On the one hand, it looks like the answer is going to be many. It is a central tent of Shepherd's philosophical system that causation is a relation whereby two or more objects combine to create a third. Since there are many instances of this causal relation, there must be many objects in the world. On the other hand, there are several moments throughout her writing where Shepherd indicates that the distinction between causes and effects is in some sense unreal, and that while the world appears to us to consist of many distinct objects interacting causally, really there is just one thing and its merely nominally distinct parts. I argue that Shepherd is an ontological pluralist, and the texts that appear to express a commitment to ontological monism are best understood as expressing ontological holism instead. [ABSTRACT FROM AUTHOR]