by Dave Maier
Last month in this space I discussed physicist Lawrence Krauss's suggestion that in advancing certain cosmological theories (concerning the early universe, dark matter, dark energy, and so on) he had thereby put to rest the age-old philosophical question “why is there something rather than nothing?”. I agreed for the most part with those who think Krauss misunderstands the question if he thinks a physical theory – any physical theory – can answer or dispel it. There were a lot of interesting comments on the post (go read them), but I think people were sometimes talking past each other. Some of the confusion and/or disagreement concerns the concept of metaphysics, so that's today's topic.
We often see “metaphysics” or “metaphysical” used as a term of abuse. (I myself use it this way sometimes.) But not all such abuse amounts to the same thing. What exactly is metaphysics “in the bad sense”? And why is there also a “good” (or at least not necessarily bad) sense of the term as well? How does the latter devolve into the former, and how can we avoid such a thing? Or must we part ways with “metaphysics” entirely, leaving only a “bad” sense of the term?
A good place to start is the entry on “Metaphysics” in the Stanford Encyclopedia of Philosophy. Its author might give us critics pause, since if there is such a thing as metaphysical Kool-aid, Peter van Inwagen has drunk as deeply of that toxic draught as any philosopher alive. However, except for the perfunctoriness of its final section, which grudingly examines (or at least mentions) the question “Is Metaphysics Possible?”, most of the article is perfectly uncontroversial, as is appropriate given the venue (really, check it out for a good introduction). Metaphysics has always been part of philosophy, whether in the ancient form of a “science of being as such”, or the modern welter of rather more specific questions about causation, modality, personal identity, mind and body, space and time, and so on.
Naturally this does not mean that such things must be unobjectionable. Maybe philosophy first barked wrongly up a single ancient tree (The Tree of Being?), turning in the modern period to bark equally wrongly up a number of related trees, and maybe what we should do now is cut out such barking altogether. But as van Inwagen points out, to say that the ancient “science” (as pursued, for example, in Aristotle's Metaphysics) was wrong-headed because there are no things that do not change is itself a “metaphysical” assertion in the modern sense; and the same is often true of contemporary dismissals of “metaphysics” broadly construed.
On the other hand, the Catch-22 nature of this defense of metaphysics, if that's what it is, should arouse our suspicions. It sounds like a “gotcha,” like the blithe, infuriating assertion that “it takes a lot of faith to be an atheist.” Indeed, it's the broader cultural spat between science and religion which provides a lot of the heat and lack of light (dark energy?) for most discussions of “metaphysics.” We have to detach, or at least locate, the latter discussion to see it properly – if not to resolve it, at least to see who the players are.
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