 Bradley’s regress arguments apply easily to the one-category ontology of universals. The same problem that Bradley articulated for trope-like qualities can be articulated for universals: namely, what is it that unites universals of whiteness, sweetness, and hardness into the particular lump of sugar? If ordinary particulars such as lumps of sugar are nothing but bundles of universal qualities, it seems important to provide an account of unity of such bundles. The challenge is particularly difficult in the case of universals because, unlike tropes, they are concieved as multiply occurring entities that are wholly present in each of their instances. Thus, the problem of uniting a bundle of universals such as whiteness, sweetness, and hardness will go hand in hand with the problem of individuation of bundles of universals, i.e., the problem of distinguishing between this particular bundle of whiteness, sweetness, and hardness and another exact duplicate bundle of whiteness, sweetness, and hardness.