Re: Is evolution really the central theory for all of biology?

From: Terry M. Gray <>
Date: Wed Sep 14 2005 - 15:11:30 EDT


Be that as it may (and I'm not sure I agree with you on this), even
as a scientific statement, no other explanation comes close to being
successful in unifying biology the evolution does. I, for one, do not
say it as an "outside of science" truth claim, but, rather, as an
"inside of science" claim, i.e. its success as an explanatory theory/
framework is unsurpassed--in other words there is scientific warrant
for evolution to have the unifying role that it has in biology.

FWIW, I've finished your book Darwin's God recently and hope to
interact with you substantially on a variety of issues.
Unfortunately, the press of other duties has prevented me thus far.


On Sep 14, 2005, at 12:45 PM, Cornelius Hunter wrote:

> Terry:
> Actually, what Dobzhansky had in mind was that creation is
> falsified by the data. He makes this point several time in the
> paper, and that is what his famous quote (which is the title of his
> paper). The statement "Nothing in biology makes sense except in the
> light of evolution" is a truth claim, outside of science. That is,
> evolutionists are saying that *no other* explanation works.
> --Cornelius
> "Terry M. Gray" <> wrote:
> Hi,
> I want to echo what David said here about the Dobzhansky quote. It's
> not that particulars don't make sense without the light of evolution.
> Obviously, you can think about blood circulation, biomechanics,
> metabolic pathways, RNA transcription, protein synthesis, etc.
> without thinking much about evolution.
> What Dobzhansky meant when he said "makes sense" has to do with the
> big picture. Why things are the way they are rather than isolated
> "brute facts"? That's the sort of questions that evolution answers.
> Why are ducks more like chickens than monkeys? You don't need
> evolution to note the similarity or even to do research that takes
> advantage of knowledge of the similarity, but if you want the
> similarity to "make sense" rather then to be a "that's just the way
> it is" evolution is your answer.
> Same for a host of hi storical and biogeographical questions. Same for
> why similarities but why differences. For example, biochemical,
> genetic code, etc. unities, but also, the diversities. Evolutionary
> ideas give explanation to these things that go "beyond" that's the
> way it is or that's the way God made it. Why is argon different from
> gold? Atomic theory in its various dimensions allow us to "make
> sense" of the differences. You can do a lot of research on argon and
> gold without asking the question why are these substances the way
> they are and whether there is any unifying theory that explains that.
> Same idea in biology.
> TG
> On Sep 14, 2005, at 10:29 AM, David C Campbell wrote:
> >
> > Everything in biology only makes sense in the light of evolution is
> > true only in the sense of "everything at once". You can turn on a
> > light switch without having a clue about electricity, but if you
> > want a
> > full understandi ng of what's happening, you need knowledge of basic
> > physics. Likewise, I can count animals without worrying how they got
> > that way, but if I want to make sense of the numbers, I must have
> some
> > idea about the factors that influence animal populations, and these
> > tie
> > directly into evolution. Again, medical testing can be done on an ad
> > hoc basis of "this works OK", but evolution provides a number of
> basic
> > explanations, such as (a) due to their common ancestry, organisms
> have
> > basic biochemical and physiological similarities, with greater
> > similarity closely reflecting the degree of relatedness. Thus,
> > testing
> > medical procedures on animals, especially primates, is expected to
> > be a
> > good proxy for humans. (b) features of humans reflect their
> > evolutionary heritage as well as their current environment, so some
> > adaptations for past conditions may be problematic now (e.g.,
> ability
> > to consume a lot of food in case of irregular availability becomes a
> > problem in times of ready availability; sturdy teeth for raw food
> > gives
> > orthodontists opportunities now that our skeletons as a whole are
> > becoming less massive, including the jaws; our backs have only a few
> > million years of mainly upright use and are not as strong as we
> think
> > when trying to lift heavy stuff) (c) disease organisms are in a
> tight
> > competition to defeat the body's defenses enough to survive and
> > reproduce without doing so much harm as to kill the host before the
> > disease can be transmitted. Thus, pathogens are likely to respond
> > rapidly to challenges (new antibiotics, etc.), and the really deadly
> > stuff will be things that normally infest other organisms and
> > accidentally get into us (bird flu, ebola, larval tapeworms, etc.)
> > (d)
> > Cancer, to survive, must constantly evolve ways to evade the body's
> > controls and defenses. (e) People are strongly inclined to act in
> > their own selfish interests and have a drive to reproduce.
> > Expectations of human behavior and likely means of disease
> > transmission
> > that do not take these into account will probably be wrong. (f)
> other
> > things I haven't thought of off the top of my head.
> >
> > Evolution is a uniting theory for all of biology, allowing us to
> > connect every aspect of it into a coherent framework. While
> > working on
> > the details, it's not always necessary and may even be
> distracting to
> > focus on it, just as in the example of using Newtonian physics
> rather
> > than a more accurate and fundamental but more complicated
> relativistic
> > calculation in dealing with spacecraft launches.
> >
> > ----------------------------------------
> > Dr. David Campbell
> > 425 Scientific Collections
> > University of Al abama, Box 870345
> > Tuscaloosa AL 35487
> > "James gave the huffle of a snail in
> > danger But no one heard him at all" A.
> > A. Milne
> >
> ________________
> Terry M. Gray, Ph.D.
> Computer Support Scientist
> Chemistry Department
> Colorado State University
> Fort Collins, CO 80523
> (o) 970-491-7003 (f) 970-491-1801

Terry M. Gray, Ph.D.
Computer Support Scientist
Chemistry Department
Colorado State University
Fort Collins, CO 80523
(o) 970-491-7003 (f) 970-491-1801
Received on Wed Sep 14 15:13:03 2005

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