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- In the interests of discussing the metaphysics of Aristotle, I ask the following question:
I am interested in the 'first cause' of 'modification' of species by means of natural selection. When a species is naturally modified in the sense of descent with modification has the modification been the effect of some efficient cause?
Joe
[Non-text portions of this message have been removed] - Herman B. Triplegood wrote:
> Darwin's theory of natural selection is not only a "mechanistic"
That's not sufficient for teleology. Aristotle himself explicitly states
> hypothesis regaring the emergence of species, but also
> a "teleological" hypothesis as well. The teleology is obvious. It is,
> to put it quite simply, the survival of the more fit, the better
> adapted.
in Physics II.8 that the "survival of the fittest" explanation of
organic generation is *opposed* to his own teleological explanation, not
compatible with it at all. Such an explanation was proposed in his time
by Empedocles.
We should read what Aristotle actually said in Physics II.8 instead of
discussing in the abstract what Aristotle would or would not have said.
> The teleological aspect of Darwin's theory, the normative sense of
The teleology there wouldn't be in the "survival of the fittest" aspect
> adaptation, ought not to be underestimated. Now, it just makes sense,
> from an Aristotelian point of view, that where there is a telos there
> is also a moving cause, some kind of a pattern of activity, a
> process, which makes that telos actually happen, and also vice versa,
> where there is an activity, especially an organic activity, there is
> a teleology at work there in the moving cause. Something, not just
> anything, is coming to be.
simply, but rather in the direction of the underlying mechanisms at work
- here, the subatomic laws that govern the molecules of DNA so that they
replicate as they do consistently. But then, nature isn't acting for the
"good" anymore, as Aristotle maintains in Physics II.8. Subatomic laws
and tendencies are what they are independently of whether the atoms in
question are part of a living organism and help it grow and develop in a
helpful manner. It has nothing to do with the "good" at all.
> How, I ask, is a law of nature NOT a final cause? It IS normative, is
Yes, but not for the good at all. In the theory of evolution, the good
> it not?
occurs consistently not because it is good, but because the subatomic
laws are what they are and do what they do quite independently of
whether they're part of an organism.
We say that falling bodies OBEY the law of gravity, just as> we now say that the gemesis process of organisms OBEYS the law of the
Yes, but not for the good at all.
> survival of the better adapted organism by means of a mechanism of
> natural selection that, as it were, takes advantage of the natural
> indeterminacies involved in the physical encoding and transmission of
> genetic information from one generation to the next. This does NOT
> mean that it is all merely accidental. It is, in point of fact, quite
> intentional. What, after all, is DOING the adapting here? The
> organisms? Or the genesis process? That, to me, is the intriguing
> question that was brought up by Hegel. So, how is all of this NOT
> deeply teleological? And, even SCIENTIFICALLY so?
> Just a closing thought. What if adapatation is all there really is to
For Aristotle, human ethics depends on a fixed human nature, not an
> evolution? Well, consider this. There may be more to the idea of
> adaptation than a result of a mere accident. The very thought of
> adaptation ties into the thought of integrity, and that, right there,
> is a thought that has as much application to ethics and politics as
> it does to biology. We should not be too quick to dismiss the cogency
> of the thought of adaptation, itself, as a fundamental teleology of
> nature, because it leads, quite naturally, organically, and even
> biologically, to a foundational thesis of ethics.
evolving one - on a human nature that is definitively and permanently
*different* from that of other animals, as Aristotle himself makes quite
clear in Nich. Ethics I.7 where he defines human happiness as activity
according to reason *precisely because* that is what definitively
distinguishes human nature from any other (plant or animal). Aristotle
is the most anti-evolution philosopher who ever lived.