In this paper, I argue that Berkeley was a theological voluntarist in the Siris. I define theological voluntarism as the view that the divine will has conceptual priority over the intellect, implying serious ramifications for the modal status of the laws of nature. I identify four theses that are required to call Berkeley a full-blown voluntarist and show that we find all of them in the Siris: (i) God’s indifferent, arbitrary and free will enjoys conceptual priority over his intellectual functions; (...) (ii) nature is directly guided by, and its laws are grounded in, God’s will, meaning not only that physical things have no causal powers or essences which could ground the laws of nature; but also that (iii) God creates and maintains the physical world in accordance with law-like patterns of the phenomena arbitrarily established by particular divine volitions. As a consequence, (iv) whatever we can know about the metaphysically contingent laws of nature we know through induction from our limited experience. The Siris is particularly interesting from the perspective of voluntarism underlying these views, as, due to the alleged discontinuities with the early works and its Platonic tendencies in general, it seems to be the worst candidate for such an interpretation. In what follows, my principal aim is to show how wrong this appearance is, and that the voluntarist views Berkeley put forward in the Siris concerning the divine nature, the God-world relation, the laws of nature and the proper scientific methodology link it very naturally to his earlier considerations. (shrink)