Individual substances are the ground of Aristotle’s ontology. Taking a liberal approach to existence, Aristotle accepts among existents entities in such categories other than substance as quality, quantity and relation; and, within each category, individuals and universals. As I will argue, individual substances are ontologically independent from all these other entities, while all other entities are ontologically dependent on individual substances. The association of substance with independence has a long history and several contemporary metaphysicians have pursued the connection. In this (...) chapter, I will discuss the intersection of these notions of substance and ontological dependence in Aristotle. I will canvass a few contemporary formulations of ontological dependence and discuss some of the interpretative difficulties in ascribing any of these formulations to Aristotle’s characterization of individual substances as ontologically independent. My aim is not to resolve fully these difficulties but to locate the topics of substance and independence relative to certain other controversies in Aristotle studies. However, I will sketch a position. In particular, elsewhere I have speculated that Aristotle is both a primitivist and a pluralist with respect to ontological dependence, and I will develop this line of interpretation a bit further later in the chapter. (shrink)

Aristotle holds that individual substances are ontologically independent from nonsubstances and universal substances but that non-substances and universal substances are ontologically dependent on substances. There is then an asymmetry between individual substances and other kinds of beings with respect to ontological dependence. Under what could plausibly be called the standard interpretation, the ontological independence ascribed to individual substances and denied of non-substances and universal substances is a capacity for independent existence. There is, however, a tension between this interpretation and the (...) asymmetry between individual substances and the other kinds of entities with respect to ontological independence. I will propose an alternative interpretation: to weaken the relevant notion of ontological independence from a capacity for independent existence to the independent possession of a certain ontological status. (shrink)

On the basis of what Aristotle says in the Posterior Analytics about how sciences are differentiated and about the impermissibility of ‘kind-crossing’, many commentators suppose that when it comes to his scientific practice, Aristotle treats the boundaries of the sciences as impermeable, so that if subject-matter X is the business of one science, it simply cannot be the business of another. I call this the impermeable boundary theory of the sciences: knowledge is divided into watertight compartments, determined by their distinct (...) genera, and what goes on in one compartment cannot turn up in another. I argue that, even if this is a correct account of Aristotle’s position in the Analytics, the view that he accepts the impermeable boundary theory when it comes to his scientific and philosophical work outside the Analytics is simply untenable. (shrink)

In various texts, Aristotle assigns priority to form, in its role as a principle and cause, over matter and the matter-form compound. Given the central role played by this claim in Aristotle's search for primary substance in the Metaphysics, it is important to understand what motivates him in locating the primary causal responsibility for a thing's being what it is with the form, rather than the matter. According to Met. Theta.8, actuality [ energeia / entelecheia ] in general is prior (...) to potentiality [ dunamis ] in three ways, viz., in definition, time and substance. I propose an explicitly causal reading of this general priority claim, as it pertains to the matter-form relationship. The priority of form over matter in definition, time and substance, in my view, is best explained by appeal to the role of form as the formal, efficient and final cause of the matter-form compound, respectively, while the posteriority of matter to form according to all three notions of priority is most plausibly accounted for by the fact that the causal contribution of matter is limited to its role as material cause. When approached from this angle, the work of Met. Theta.8 can be seen to lend direct support to the more specific and explicitly causal priority claim we encounter in Met. Z.17, viz., that form is prior to matter in its role as the principle and primary cause of a matter-form compound's being what it is. (shrink)

First Philosophy and the Kinds of Substance JOSEPH G. DEFILIPPO ON A CERTAIN INTERPRETATION Aristotle's Metaphysics contains two incompati- ble conceptions of metaphysics or, as he calls it, first philosophy. At two points in the treatise he identifies first philosophy with theology . Along with this identification comes a certain view about the nature and number of theoretical sciences. We are told in E. 1 that there are three: natural philosophy, mathematics, and theology. Natural philosophy deals with nonseparate,' mutable substance, (...) whereas the objects of mathematics are nonseparate but immutable. It is left to theology to study substance that is both separate and immutable . Hence it is prior to the other two theoretical sciences and more worthy of honor. But for Aristotle first philosophy is not merely a compartmentalized science concerned with a single genus or kind of substance; he means it to be a universal science of "being qua being." Indeed, it is the status of first philosophy as the primary theoretical science that is supposed to provide for its universal scope. As he says in E. 1, it is universal "in this way, because it is first" 0o26a3o-31). Large and well- known difficulties loom in the way of this tantalizing idea. First, it is not clear how theology's position of primacy is the cause of its universal scope; if anything, divine substance seems to be a special item within a more.. (shrink)