The topic of free will is a very complex one, no matter what context one might put it in. In contemporary terms, its existence is as of yet undecided, and it is unclear whether we will ever be able to offer a satisfying conclusion to the matter. What we can do, however, is to discuss free will in a more easily digestible frame of reference, like that of Dune. Being a science-fiction novelist, Frank Herbert had the opportunity to play around with a number of interesting topics, and it is my goal to discuss a very particular one: determinism. By describing Dune as deterministic, I will create a framework for the central problem of this thesis: is it possible for a deterministic subject to develop free will? The notion that something like free will might arise in a purely deterministic universe is a curious one, not least because it is not something we often come across. However, at a certain point in the series, the human race undergoes a qualitative change in existence, with the implication being that it had transcended the deterministic universe in which it had no real agency up until then. This process will be explicated and expanded upon with a variety of sources from renowned philosophers and Herbert’s writings. It is important to note that I will presuppose Herbert’s idea of prescience as the clear signifier of a deterministic universe. Before the issue is presented in-depth, I will first provide two main pillars for the argument to rest upon. The first is determinism itself: a historical and contemporary discussion of the matter. The second is a short summary of Dune’s relevant narrative threads. These two features will combine into one comprehensive whole, which I will use to discuss how free will may have developed in the universe of Dune.