 There are a couple of problems with this view, however. One is that Descartes holds that it follows from God’s essence that God is eternal and that His will is wholly immutable (The Third Meditation, AT 7:45, CSM 2:31; Principles I.56, AT 8A:26, CSM 1:211; “To Mersenne, 15 April 1630,” AT 1:145–6, CSMK 23; Principles II:36, AT 8A:61, CSM 1:24). If it is a necessary truth that God is eternal and that His will is immutable, then there does not exist the possibility that God’s eternal will could have been other than it is. So that possibility does not exist; and neither does it appear that there exist any possible creatures. Descartes holds that there is a single series that God preordains and that is (as would be expected) immutable (Principles I.40–41, AT 8A:20, CSM 1:206). If God created things that were merely possible, it is unclear how He would be able to actualize them instead of the things that are actualized in the series, if none of the requisite possibilities exist, and so it is unclear how they would constitute possibilities. These alleged possibilities (if they are anything) would be among all of the other creatures; they would be actuals.