Diversity Reading List

Publisher's Note: What do blue things have in common? Or electrons? Or planets? Distinct things appear to share properties; but what are properties and what is the best philosophical account of them? A Critical Introduction to Properties introduces different ontological accounts of properties, exploring how their formulation is shaped by the explanatory demands placed upon them. This accessible introduction begins with a discussion of universals, tropes, sets and resemblance classes, the major objections to them and their responses, providing readers with a firm grasp on the competing ontological accounts of what (if anything) grounds similarity and difference. It then explores issues concerning the formulation and justification of property theories such as: how many properties are there? Should we accept a sparse ontology of properties, or an abundant one? Can we make a distinction between intrinsic and extrinsic properties? Do properties have their causal roles necessarily? What is the relationship between properties and other metaphysical phenomena such as causality, laws and modality? These questions get to the heart of why a coherent theory of properties is so important to metaphysics, and to philosophy more generally. By concluding with the question of the ontological status of properties, the reader is introduced to some Carnapian and contemporary themes about the content and methodology of metaphysics. For students looking for an accessible resource and a more comprehensive understanding of contemporary metaphysics, A Critical Introduction to Properties is a valuable starting point.

Summary: Something could be round even if it were the only thing in the universe, unaccompanied by anything distinct from itself. Jaegwon Kim once suggested that we define an intrinsic property as one that can belong to something unaccompanied. Wrong: unaccompaniment itself is not intrinsic, yet it can belong to something unaccompanied. But there is a better Kim-style definition. Say that P is independent of accompaniment iff four different cases are possible: something accompanied may have P or lack P, something unaccompanied may have P or lack P. P is basic intrinsic iff (1) P and not-P are nondisjunctive and contingent, and (2) P is independent of accompaniment. Two things (actual or possible) are duplicates iff they have exactly the same basic intrinsic properties. P is intrinsic iff no two duplicates differ with respect to P.

Abstract: This paper describes motivations for the view that some objects have essential properties: properties which they must have in any world/situation where they exist (without qualification). I raise objections to the motivations for so-called ``hardcore essentialism''. And I articulate and defend an alternative theory: explanation-relative essentialism.