Christopher Buckels

The paper offers an interpretation of a disputed portion of Plato’s Theaetetus that is often called the Secret Doctrine. It is presented as a process ontology that takes two types of processes, swift and slow motions, as fundamental building blocks for ordinary material objects. Slow motions are powers which, when realized, generate swift motions, which, in turn, are subjectively bundled to compose sensible objects and perceivers. Although the reading of the Secret Doctrine offered here—a new version of the “Causal Theory interpretation”—is not without problems, these problems are acknowledged in Plato’s text, confirming that this interpretation is correct.

This paper provides a rational reconstruction of a Platonic trope bundle theory that is a live alternative to contemporary bundle theories. According to the theory, Platonic particulars are composed of what Plato calls images of Forms; contemporary metaphysicians call these tropes. Tropes are dependent on Forms and the Receptacle, while trope bundles are structured by natural kinds using the Phaedo's principles of inclusion and exclusion and the Timaeus’ geometrised elements, as well as by co-location in the Receptacle. Key elements of discussion include persistence and abundance of Plato's tropes. The resulting theory is compared with contemporary trope bundle theories.

Three problems threaten any account of philosophical rule in the Republic. First, Socrates is supposed to show that acting justly is always beneficial, but instead he extols the benefits of having a just soul. He leaves little reason to believe practical justice and psychic justice are connected and thus to believe that philosophers will act justly. In response to this problem, I show that just acts produce just souls. Since philosophers want to have just souls, they will act justly. Second, Socrates’ alleged aim is to demonstrate that justice is beneficial, but philosophers, who have to give up a life of philosophy to rule, actually appear to be harmed by ruling. I explain that, since the founders of the city justly command them to rule, philosophers cannot, in fact, obtain a better life, and so ruling does not harm them. Third, it seems incongruous that philosophers, who should, as just people, jump at the opportunity to rule Kallipolis, must be compelled to rule. I show that Plato carefully constructs an educational system that produces rulers who do not want to rule, since such rulers alone will rule best.

The ‘traditional’ interpretation of the Receptacle in Plato’s Timaeus maintains that its parts act as substrata to ordinary particulars such as dogs and tables: particulars are form-matter compounds to which Forms supply properties and the Receptacle supplies a substratum, as well as a space in which these compounds come to be. I argue, against this view, that parts of the Receptacle cannot act as substrata for those particulars. I also argue, making use of contemporary discussions of supersubstantivalism, against a substratum interpretation that separates substratum and space in the Timaeus.

A standard interpretation of Plato’s metaphysics holds that sensible particulars are images of Forms. Such particulars are fairly independent, like Aristotelian substances. I argue that this is incorrect: Platonic particulars are not Form images but aggregates of Form images, which are property-instances. Timaeus 49e-50a focuses on “this-suches” and even goes so far as to claim that they compose other things. I argue that Form images are this-suches, which are tropes. I also examine the geometrical account, showing that the geometrical constituents of the elements are also Form images. Thus everything in the sensible world is composed of tropes.

The paper argues that Motion and Rest are “greatest kinds” and not just convenient examples, since they are all-pervading. Thus Motion and Rest can be jointly predicated of a single subject and can be predicated of each other, just as Sameness and Otherness can. While Sameness and Otherness are opposites, a single subject may be the same in one respect, namely, the same as itself, and other in another respect, namely, other than other things. Thus they can be predicated of a single subject, and they can be predicated of each other, as well, since Sameness is other than other things and Otherness is the same as itself. The same explanation applies to Motion and Rest, as the paper demonstrates: a given subject may be in motion in one respect while being at rest in another respect. This distinction is made in the Sophist itself, right in the passage concerning the greatest kinds. Thus Motion and Rest should be considered greatest kinds on par with Being, Sameness, and Otherness, and each of these kinds pervades all other kinds.

Payne's commentary on Republic I–VII is not advanced as a sustained argument for the new type of teleology he finds there but is structured by themes in the text. It engages with selected previous scholarship on the Republic and is written with care and deliberation. Payne begins with an overview of the types of teleology, or end-directed action, found in Plato's corpus, but does not address contemporary philosophy of action. Payne's own "functional teleology of action" accounts for how agents act for the sake of ends of which they are unaware, as when mathematical study is directed to the Form of the Good...