The possibility of onion worlds: Rebutting an argument for structural universals1

This is the authors' abstract. We don't add key points for this paper.

Some argue that theories of universals should incorporate structural universals, in order to allow for the metaphysical possibility of worlds of ‘infinite descending complexity’ (‘onion worlds’). I argue that the possibility of such worlds does not establish the need for structural universals. So long as we admit the metaphysical possibility of emergent universals, there is an attractive alternative description of such cases.