This article gives an overview of the mereological thought of the medieval philosopher and theologian Saint Thomas Aquinas. Until the 20th century mereology—the study of the relationship of whole and part—was not generally recognized as a distinct domain of philosophy and so Aquinas, like most of his contemporaries, has no single systematic treatment of it as a topic in its own right. However, a cohesive account of part‐whole relations can be pieced together from the various metaphysical, ethical and theological contexts (...) in which Aquinas deals with mereological issues. In this article, I give an account of both Aquinas's conceptual understanding of composition and his taxonomy of the different kinds of wholes and parts that there are. I end with comments on three marginal cases of mereological relationships in Aquinas's philosophy. (shrink)

Aesthetics is the part of contemporary academic philosophy that is concerned with art, beauty, criticism, and taste. As such, it must address metaphysical issues, epistemic problems, and questions of value. This makes it difficult to present a coherent account of the subject matter of aesthetics. In this article, I argue that this difficulty is the result of ambiguities and contradictions that arose in disputes about the relationship between the science of aesthetics, the critique of taste, and the philosophy of art (...) in German philosophy during the eighteenth and early nineteenth century. By reconstructing the history of these debates, I hope to shed new light on the origins of aesthetics as a discipline and to explain why its subject matter and status within philosophy are still so difficult to define. (shrink)

ABSTRACTMost of Spinoza’s arguments for God’s existence do not rely on any special feature of God, but instead on merely general features of substance. This raises the following worry: those arguments prove the existence of non-divine substances just as much as they prove God’s existence, and yet there is not enough room in Spinoza’s system for all these substances. I argue that Spinoza attempts to solve this problem by using a principle of plenitude to rule out the existence of other (...) substances and that the principle cannot be derived from the PSR, as many claim.Abbreviation: PSR: Principle of Sufficient Reason. (shrink)

Table of Formal and Descriptivists Ontologists (PDF - from Bernard Bolzano to present time) Ontologists of the 19th and 20th Centuries (a selection of critical judgments about some of the greatest philosophers of the recent past) Living Ontologists (a list of authors with an interest in ontology, with synthetic bibliographies).