Abstract

In this paper, I consider an objection to ``natural class''trope nominalism, the view that a trope's nature isdetermined by its membership in a natural class of tropes.The objection is that natural class trope nominalismis inconsistent with causes' being efficacious invirtue of having tropes of a certain type. I arguethat if natural class trope nominalism is combinedwith property counterpart theory, then this objectioncan be rebutted.