Abstract: George Berkeley notoriously claimed that his immaterialist metaphysics was not only consistent with common sense, but that it was also integral to its defense. This book argues that understanding the basic connection between Berkeley's philosophy and common sense requires a better understanding of the four principle components of Berkeley's positive metaphysics: the nature of being, the divine language thesis, the active/passive distinction, and the nature of spirits. This book begins by focusing on Berkeley's view of the nature of being. It elucidates Berkeley's view on Locke and the Cartesians, and examines Berkeley's views about related concepts such as unity and simplicity. From there, it moves on to Berkeley's philosophy of language, arguing that scrutiny of the famous Introduction to the Principles of Human Knowledge reveals that Berkeley identified the ideational theory of meaning and understanding as the root cause of some of the worst of humanity's intellectual errors, not abstract ideas. Abstract ideas are, rather, the most debilitating symptom of this underlying ailment. In place of the ideational theory, Berkeley defends a rudimentary use theory of meaning. This understanding of Berkeley's approach to semantics is then applied to the divine language thesis and is shown to have important consequences for Berkeley's pragmatic approach to the ontology of natural objects and for his approach to our knowledge of, and relation to, other minds, including God's. Turning next to Berkeley's much maligned account of spirits, the book defends the coherence of Berkeley's view of spirits by way of providing an interpretation of the active/passive distinction as marking a normative distinction and by focusing on the role that divine language plays in letting Berkeley identify the soul with the will. With these four principles of Berkeley's philosophy in hand, the book returns to the topic of common sense and offers a defense of Berkeley's philosophy as built upon, and expressive of, the deepest metaphysical commitments of mainstream Christianity.

Keywords: immaterialist metaphysics, common sense, positive metaphysics, nature of being, divine language thesis, active/passive distinction, nature of spirits, Christianity