 However, consider AP1 again, the possibility of an entirely different collection of finite modes. According to Curley, because no member of the collection exists necessarily, the collection itself is not necessary. That is, God could have brought about an entirely different series of finite modes. If so, what explains why this series of finite modes exists as opposed to one of the alternative possible series? (The question is not why God chose to create this series of modes rather than another possible series, a question that animated Leibniz. Spinoza denies that God has a will in the traditional sense, and so talk about choosing one possible world over another has no place in Spinoza’s system (Ip17s and IIp49c). Nonetheless, the PSR demands a reason in virtue of which God realizes this series of finite modes rather than another possible series.)