Free Republic
Browse · Search
Religion
Topics · Post Article

To: Driveblock
Another case where the author should have spent a little effort to understand why his opponents believe what they believe: Punctuated equilibrium describes the kind of dominant pattern that an orthodox Darwinian paleontologist should expect to find.

Or as Richard Dawkins, supposedly the mortal enemy of Punk Eek, explains it:

The theory of speciation resulting from initial geographical separation has long been a cornerstone of mainstream, orthodox neo-Darwinism, and it is still accepted on all sides as the main process by which new species come into existence (some people think there are others as well). Its incorporation into modern Darwinism was largely due to the influence of the distinguished zoologist Ernst Mayr. [The punctuationists asked themselves:] Given that, like most neo-Darwinians, we accept the orthodox theory that speciation starts with geographical isolation, what should we expect to see in the fossil record?

... The 'gaps', far from being annoying imperfections or awkward embarrassments, turn out to be exactly what we should positively expect, if we take seriously our orthodox neo-Darwinian theory of speciation. ... [W]hen we look at a series of fossils from any one place, we are probably not looking at an evolutionary event at all: we are looking at a migrational event....

The point that Eldredge and Gould were making, then, could have been modestly presented as a helpful rescuing of Darwin and his successors from what had seemed to them an awkward difficulty. Indeed that is, at least in part, how it was presented - initially. ...

Eldredge and Gould could have said:

Darwin, when you said that the fossil record was imperfect, you were understating it. Not only is it imperfect, there are good reasons for expecting it to be particularly imperfect just when it gets interesting, just when evolutionary change is taking place; this is partly because evolution usually occurred in a different place from where we find most of our fossils; and it is partly because, even if we are fortunate enough to dig in one of the small outlying areas where most evolutionary change went on, that evolutionary change (though still gradual) occupies such a short time that we should need an extra rich fossil record in order to track it!

But no, instead they chose, especially in their later writings in which they were eagerly followed by journalists, to sell their ideas as being radically opposed to Darwin's and opposed to the neo-Darwinian view of evolution ....

... The proper way to characterize the beliefs of punctuationists is: 'gradualistic, but with long periods of "stasis" (evolutionary stagnation) punctuating brief episodes of rapid gradual change'. The emphasis is then thrown onto the long periods of stasis as being the previously overlooked phenomenon that really needs explaining. It is the emphasis on stasis that is the punctuationists' real contribution, not their claimed opposition to gradualism, for they are truly as gradualist as anybody else..]
Richard Dawkins, The Blind Watchmaker, 1996 ed., pp238-252


8 posted on 01/21/2006 4:00:50 PM PST by jennyp (WHAT I'M READING NOW: Freakonomics by Levitt & Dubner)
[ Post Reply | Private Reply | To 1 | View Replies ]


To: jennyp

You are saying, in different words, that orthodox Darwinists find the fossil record to be in complete accord with their view of evolution. True. What can't be escaped is that Gould considered his concept to be 1) more faithful to the evidence in the fossil record than Neo-Darwinism is and 2) different from orthodox Neo-Darwinism. Dawkins may believe that Gould agreed with him (while merely placing emphasis on different aspects of the evidence), but it is clear that Gould considered his own views to differ from Dawkins'.


10 posted on 01/21/2006 5:23:33 PM PST by Driveblock
[ Post Reply | Private Reply | To 8 | View Replies ]

Free Republic
Browse · Search
Religion
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson