Abstract
Devin Henry’s excellent book takes on Aristotle’s theory of substantial generation. Substantial generation is the sort of “unqualified” change in which a substance comes to be: it is what happens when Socrates comes to be, rather than when he grows a centimetre taller (1). Henry’s overarching argument is that “Aristotle employs a single model of generation throughout the corpus”: the hylomorphic model.
This argument comes in two stages. Chapters 2-4 introduce the three principles of the hylomorphic model: matter, form, and efficient cause. Chapters 5-8 consider these principles in Aristotle’s account of animal generation. This discussion is framed by an introduction and two chapters that consider the wider context: Aristotle’s reaction to his intellectual inheritance and his cosmological perspective on generation.
The result is a thoughtful, systematic account of Aristotle’s theory and the biological details that fill it out in practice. Its central moves are philosophically rich, well-argued, and responsive to a variety of texts. Indeed, a significant strength is its sustained attention to not only to the implications of the Physics and GC’s more abstract framework for our understanding of the biological details, but also the puzzles those details raise for the theoretical account. Moreover, its careful analysis and formulations of existing debates point up important questions.