Aristotle claims that in making an animal, nature acts like a “good housekeeper” who “is accustomed to throw out nothing from which it is possible to make something useful” (744b16–17). How does nature act when it “make[s] something useful” in these cases – and does it differ from other ways it acts? I defend two main claims. The first is that Meteor. 4.2’s distinction between two sorts of ‘concoction’ processes offers an underappreciated source of evidence for answering this question. My (...) second claim concerns the nature of those processes and the ends they realize. While they are both the ends of their respective types of concoction, they differ in that some essential (process-defining) features of the second end – but not the first – are supplied by what the capacities of the “underlying” patient (on which the agent acts) are for. The result is a distinction between two kinds of end-directed efficient causation. (shrink)

Aristotle’s Meteorology 4.12 is puzzling, in part because the chapter appears to extend teleological explanation to include certain inorganic materials without natural biological functions, such as metals and stone. This paper examines two attempts to explain why such materials can have functions, and shows that they are problematic. As an alternative, I argue that raw inorganic materials—as well as separated parts of organisms—can have extrinsic functions. Extrinsic functions can explain why natural inorganic materials can be sorted into natural kinds, even (...) if their functions are ultimately related to their uses in the productive arts. (shrink)

Aristotle claims that just as a builder uses ‘tools’ to build a house, so too the soul ‘use[s] heat and coldness as tools’ to build an animal (Generation of Animals 740b25–34). I consider two questions about this claim: (1) what sorts of things does the soul use, and what is it for things like them to be organized? and (2) what philosophical work does this sort of organization do in Aristotle’s account of animal generation? I argue that the soul needs (...) flexible intermediate agents, that it organizes them in a way that exploits their flexibility, and that this is due to the demands of a complex, multi-stage process directed at a single end. (shrink)

Aristotle’s Metaphysics Θ.8 argument for the priority of actuality to potentiality poses an immediate interpretive problem: the argument uses two distinct tests for priority, one of which threatens to reverse the results of the other. This paper argues that the standard approach to this passage, according to which one thing is prior to another when it satisfies the ontological independence test from Metaphysics Δ.11, fails to secure the argumentative unity of the passage. It introduces a new, causal account of priority (...) which explains both Aristotle’s claims about priority and the way he argues for them. (shrink)