Sharon Ford

In accounting for the objects and properties of the manifest world, issues include the fundamentality, causal efficacy and ontological robustness of the dispositional versus the non-dispositional. Concerning fundamentality, the available options seem to be that: dispositional and categorical properties are different kinds, both fundamental; dispositional and categorical properties are one and the same, and fundamental; only categorical properties are fundamental while dispositional properties, if they exist, are higher-order; and only dispositional properties are fundamental while categorical properties, if they exist, are higher-order. The viability of option, a pure-power ontology, has met detracting arguments from several quarters. This paper outlines why the fourth option appears nonetheless attractive and provides a defence for its credibility by suggesting how the manifestly qualitative world can be explained without recourse to fundamental categorical properties.

This paper largely engages with Brian Ellis’s description of categorical dimensions as put forward in his paper in this volume. The New Essentialism advocated by Ellis posits the ontologically-robust existence of both dispositional and categorical properties. I have argued that the distinction that Ellis draws between the two is unpersuasive, and that the causal role of categorical dimensions—what they do—is inseparable from what they are. This observation is reinforced by the fact that absolute physical quantities permit re-interpretations of measurement that remove a clear differentiation between categoricity and dispositionality. Distinguishing between ‘pure power’ and ‘dispositionality’, I further argue that: i) there are no ontologically-robust categorical properties, although their apparent existence is explicable as higher-order and supervenient; ii) that the fundamental ingredients of the world may be accounted for in terms of pure-power that is neither categorical nor dispositional; and iii) that the categorical-dispositional distinction arises only at the higher-order level of objects, and does not in any case constitute ontologically-robust partitioning of reality.

Seeking to derive the manifestly qualitative world of objects and entities without recourse to fundamental categoricity or qualitativity, I offer an account of how higher-order categorical properties and objects may emerge from a pure-power base. I explore the possibility of ‘fields’ whose fluctuations are force-carrying entities, differentiated with respect to a micro-topology of curled-up spatial dimensions. Since the spacetime paths of gauge bosons have zero ‘spacetime interval’ and no time-like extension, I argue that according them the status of fundamental entities would support a pure-power ontology. Such entities, circulating within self-sustaining micro-topological ‘networks’, feasibly maintain definite spatial configurations of conserved physical quantities, including energy-momentum. Perceived as time-like and massy, and representing fermionic entities, they give rise to the manifest world.

This Thesis engages with contemporary philosophical controversies about the nature of dispositional properties or powers and the relationship they have to their non-dispositional counterparts. The focus concerns fundamentality. In particular, I seek to answer the question, ‘What fundamental properties suffice to account for the manifest world?’ The answer I defend is that fundamental categorical properties need not be invoked in order to derive a viable explanation for the manifest world. My stance is a field-theoretic view which describes the world as a single system comprised of pure power, and involves the further contention that ‘pure power’ should not be interpreted as ‘purely dispositional’, if dispositionality means potentiality, possibility or otherwise unmanifested power or ability bestowed upon some bearer. The theoretical positions examined include David Armstrong’s Categoricalism, Sydney Shoemaker’s Causal Theory of Properties, Brian Ellis’s New Essentialism, Ullin Place’s Conceptualism, Charles Martin’s and John Heil’s Identity Theory of Properties and Rom Harré’s Theory of Causal Powers. The central concern of this Thesis is to examine reasons for holding a pure-power theory, and to defend such a stance. This involves two tasks. The first requires explaining what plays the substance role in a pure-power world. This Thesis argues that fundamental power, although not categorical, can be considered ontologically-robust and thus able to fulfil the substance role. A second task—answering the challenge put forward by Richard Swinburne and thereafter replicated in various neo-Swinburne arguments—concerns how the manifestly qualitative world can be explained starting from a pure-power base. The Light-like Network Account is put forward in an attempt to show how the manifest world can be derived from fundamental pure power.

Sydney Shoemaker’s causal theory of properties is an important starting place for some contemporary metaphysical perspectives concerning the nature of properties. In this paper, I discuss the causal and intrinsic criteria that Shoemaker stipulates for the identity of genuine properties and relations, and address George Molnar’s criticism that holding both criteria presents an unbridgeable hypothesis in the causal theory of properties. The causal criterion requires that properties and relations contribute to the causal powers of objects if they are to be deemed genuine rather than ‘mere-Cambridge’. The intrinsic criterion requires that all genuine properties and relations be intrinsic. Molnar’s S-property argument says that these criteria conflict if one considers extrinsic spatiotemporal properties and relations to contribute causally. In this paper, I argue that a solution to the contradiction that Molnar identifies involves a denial of discreteness between objects, leading to a power holist perspective and a resulting deflationary account of intrinsicality.

In this paper I argue that the requirement for the qualitative is theory-dependent, determined by the fundamental assumptions built into the ontology. John Heil’s qualitative, in its role as individuator of objects and powers, is required only by a theory that posits a world of distinct objects or powers. Does Heil’s ‘deep’ view of the world, such that there is only one powerful object require the qualitative as individuator of objects and powers? The answer depends on whether it is possible to account for the manifest objects and the ostensible spatial primacy of our perceived world without recourse to the qualitative. In this paper I outline just such an account with the intention of extending Heil’s efforts to incorporate fundamental power in the world while providing a coherent explanation for our strong intuition of spatial, as against relational, priority