David Robb

Worries about mental causation are prominent in contemporary discussions of the mind and human agency. Originally, the problem of mental causation was that of understanding how a mental substance (thought to be immaterial) could interact with a material substance, a body. Most philosophers nowadays repudiate immaterial minds, but the problem of mental causation has not gone away. Instead, focus has shifted to mental properties. How could mental properties be causally relevant to bodily behavior? How could something mental qua mental cause what it does? After looking at the traditional Problem of Interaction, we survey various versions of the property-based problem and look at proposed solutions to them.

It is becoming increasingly clear that the deepest problems currently exercising philosophers of mind arise from an ill-begotten ontology, in particular, a mistaken ontology of properties. After going through some preliminaries, we identify three doctrines at the heart of this mistaken ontology: (P) For each distinct predicate, “F”, there exists one, and only one, property, F, such that, if “F” is applicable to an object a, then “F” is applicable in virtue of a’s being F. (U) Properties are universals, not particulars. (D) Every property is either categorical or dispositional, but not both. We show how these doctrines influence current philosophical thinking about the mind, suggest and defend an alternative conception of properties, and indicate how this conception provides answers to two puzzles besetting contemporary philosophy of mind: the problem of mental causation and the problem of qualia.