 An essential part of an adequate modal fictionalist theory is a specification of the fiction of possible worlds which is to be employed. As well as selecting one of the many potential candidate stories about worlds, it is also essential to provide an explanation and justification of the choice. This is very rarely done by modal fictionalists (Armstrong 1989 provides an exception). This is not to say that it cannot be done, or cannot be done plausibly: but justifying the choice of fiction is not something that can be neglected if a modal fictionalist theory is to be convincing. Christopher Peacocke (Peacocke 1999, p. 154) charges Rosen’s modal fictionalist with “fetishism” unless the fictionalist can say what is so distinctive about the particular fiction chosen.