The Word ‘Metaphysics’ and the Concept of Metaphysics
The word ‘metaphysics’ is notoriously hard to define. Twentieth-century coinages like ‘meta-language’ and ‘metaphilosophy’ encourage the impression that metaphysics is a study that somehow “goes beyond” physics, a study devoted to matters that transcend the mundane concerns of Newton and Einstein and Heisenberg. This impression is mistaken. The word ‘metaphysics’ is derived from a collective title of the fourteen books by Aristotle that we currently think of as making up Aristotle’s Metaphysics. Aristotle himself did not know the word. (He had four names for the branch of philosophy that is the subject-matter of Metaphysics: ‘first philosophy’, ‘first science’, ‘wisdom’, and ‘theology’.) At least one hundred years after Aristotle’s death, an editor of his works (in all probability, Andronicus of Rhodes) titled those fourteen books “Ta meta ta phusika”—“the after the physicals” or “the ones after the physical ones”—the “physical ones” being the books contained in what we now call Aristotle’s Physics. The title was probably meant to warn students of Aristotle’s philosophy that they should attempt Metaphysics only after they had mastered “the physical ones”, the books about nature or the natural world—that is to say, about change, for change is the defining feature of the natural world.
This is the probable meaning of the title because Metaphysics is about things that do not change. In one place, Aristotle identifies the subject-matter of first philosophy as “being as such”, and, in another as “first causes”. It is a nice—and vexed—question what the connection between these two definitions is. Perhaps this is the answer: The unchanging first causes have nothing but being in common with the mutable things they cause. Like us and the objects of our experience—they are, and there the resemblance ceases. (For a detailed and informative recent guide to Aristotle’s Metaphysics, see Politis 2004.)
Should we assume that ‘metaphysics’ is a name for that “science” which is the subject-matter of Aristotle’s Metaphysics? If we assume this, we should be committed to something in the neighborhood of the following theses:
- The subject-matter of metaphysics is “being as such”
- The subject-matter of metaphysics is the first causes of things
- The subject-matter of metaphysics is that which does not change
Any of these three theses might have been regarded as a defensible statement of the subject-matter of what was called ‘metaphysics’ until the seventeenth century. But then, rather suddenly, many topics and problems that Aristotle and the Medievals would have classified as belonging to physics (the relation of mind and body, for example, or the freedom of the will, or personal identity across time) began to be reassigned to metaphysics. One might almost say that in the seventeenth century metaphysics began to be a catch-all category, a repository of philosophical problems that could not be otherwise classified as epistemology, logic, ethics or other branches of philosophy. (It was at about that time that the word ‘ontology’ was invented—to be a name for the science of being as such, an office that the word ‘metaphysics’ could no longer fill.) The academic rationalists of the post-Leibnizian school were aware that the word ‘metaphysics’ had come to be used in a more inclusive sense than it had once been. Christian Wolff attempted to justify this more inclusive sense of the word by this device: while the subject-matter of metaphysics is being, being can be investigated either in general or in relation to objects in particular categories. He distinguished between ‘general metaphysics’ (or ontology), the study of being as such, and the various branches of ‘special metaphysics’, which study the being of objects of various special sorts, such as souls and material bodies. (He does not assign first causes to general metaphysics, however: the study of first causes belongs to natural theology, a branch of special metaphysics.) It is doubtful whether this maneuver is anything more than a verbal ploy. In what sense, for example, is the practitioner of rational psychology (the branch of special metaphysics devoted to the soul) engaged in a study of being? Do souls have a different sort of being from that of other objects?—so that in studying the soul one learns not only about its nature (that is, its properties: rationality, immateriality, immortality, its capacity or lack thereof to affect the body …), but also about its “mode of being”, and hence learns something about being? It is certainly not true that all, or even very many, rational psychologists said anything, qua rational psychologists, that could plausibly be construed as a contribution to our understanding of being.
Perhaps the wider application of the word ‘metaphysics’ was due to the fact that the word ‘physics’ was coming to be a name for a new, quantitative science, the science that bears that name today, and was becoming increasingly inapplicable to the investigation of many traditional philosophical problems about changing things (and of some newly discovered problems about changing things).
Whatever the reason for the change may have been, it would be flying in the face of current usage (and indeed of the usage of the last three or four hundred years) to stipulate that the subject-matter of metaphysics was to be the subject-matter of Aristotle’s Metaphysics. It would, moreover, fly in the face of the fact that there are and have been paradigmatic metaphysicians who deny that there are first causes—this denial is certainly a metaphysical thesis in the current sense—others who insist that everything changes (Heraclitus and any more recent philosopher who is both a materialist and a nominalist), and others still (Parmenides and Zeno) who deny that there is a special class of objects that do not change. In trying to characterize metaphysics as a field, the best starting point is to consider the myriad topics traditionally assigned to it.