home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!cis.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!garnet.berkeley.edu!philjohn
- From: philjohn@garnet.berkeley.edu (Phillip Johnson)
- Newsgroups: talk.origins
- Subject: Topic for Discussion?
- Date: 22 Jan 1993 05:56:08 GMT
- Organization: University of California, Berkeley
- Lines: 59
- Message-ID: <1jo29o$srt@agate.berkeley.edu>
- NNTP-Posting-Host: garnet.berkeley.edu
-
- I am not sure that it is possible to hold a discussion in this
- group, because the majority of participants seem to consider the
- neo-Darwinian theory to be so obviously true that doubt is not
- taken seriously. On that basis, what is there to discuss?
-
- If there is to be any hope to go beyond browbeating (a style of
- argument that may silence dissenters but never convinces them),
- the subject must be one about which there is a concededly a
- reasonable basis for disagreement. So I will try to state a question
- that can be the subject of genuine discussion. In his FAQ on evolutionary
- biology, Chris Colby begins with the question: "What is
- Evolution?" He answers by citing as an example the familiar case
- of the peppered moth:
-
- "The kind of evolution documented above [in the peppered moth
- example] is called "microevolution". Larger changes (taking more
- time) are termed "macroevolution". Some biologists feel the
- mechanisms of macroevolution are different from those of
- microevolutionary change. Others, including myself, feel the
- distinction between the two is arbitrary. Macroevolution is
- cumulative microevolution."
-
- This wording acknowledges that "some biologists" do not think
- that the peppered moth example illustrates a creative process
- that can produce new species, much less new complex organs.
- Indeed, that is true. To give only a single example, the
- doctrine that "macroevolution is cumulative microevolution" is
- the theory that Stephen Jay Gould once pronounced to be
- "effectively dead," in a paper in which he endorsed a modified
- version of the macromutational views of Richard Goldschmidt.
- (See Darwin on Trial, Chapters Two and Three, esp. p. 40). Of
- course an adaptive macromutational mechanism -- in Gould's words
- "a potential saltational origin for the essential features of key
- adaptations" -- has yet to be demonstrated.
-
- I would say that it is reasonable for a well-informed observer to
- conclude that macroevolution (i.e. the creative process that
- produced complex plants and animals in the first place) is not
- "cumulative microevolution" (i.e. the peppered moth example writ
- large over geological time). If so, it is also reasonable to
- conclude that the mechanism of macroevolution is an unsolved
- mystery. This does not necessarily imply supernatural creation,
- because it is possible that science will discover a naturalistic
- mechanism at some time in the future. It is also not "anti-
- science." Indeed, students with inquiring minds may be more
- attracted to the field of evolutionary biology if they are told
- that they have an opportunity to try to solve a big mystery,
- rather than merely to fill in the details of the neo-Darwinian
- picture. Of course, there can be no guarantee that they will
- succeed.
-
- My impression is that many participants in this group think that
- the position stated in the preceding paragraph is unreasonable,
- and even in some sense reprehensible. Is that correct? If so,
- why?
- --
- Phillip E. Johnson
- School of Law, University of California, Berkeley CA 94720
-
-