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To: metacognative
Gould's theory is "punctuated equilibrium", which states that darwinian accumulation of small changes is/was invalid.

What Gould really said:

"I count myself among the evolutionists who argue for a jerky, or episodic, rather than a smoothly gradual, pace of change. In 1972 my colleague Niles Eldredge and I developed the theory of punctuated equilibrium. We argued that two outstanding facts of the fossil record—geologically "sudden" origin of new species and failure to change thereafter (stasis)—reflect the predictions of evolutionary theory, not the imperfections of the fossil record. In most theories, small isolated populations are the source of new species, and the process of speciation takes thousands or tens of thousands of years. This amount of time, so long when measured against our lives, is a geological microsecond. It represents much less than 1 per cent of the average life-span for a fossil invertebrate species—more than ten million years. Large, widespread, and well established species, on the other hand, are not expected to change very much. We believe that the inertia of large populations explains the stasis of most fossil species over millions of years.

"We proposed the theory of punctuated equilibrium largely to provide a different explanation for pervasive trends in the fossil record. Trends, we argued, cannot be attributed to gradual transformation within lineages, but must arise from the different success of certain kinds of species. A trend, we argued, is more like climbing a flight of stairs (punctuated and stasis) than rolling up an inclined plane.

"Since we proposed punctuated equilibria to explain trends, it is infuriating to be quoted again and again by creationists—whether through design or stupidity, I do not know—as admitting that the fossil record includes no transitional forms. Transitional forms are generally lacking at the species level, but they are abundant between larger groups. Yet a pamphlet entitled 'Harvard Scientists Agree Evolution Is a Hoax' states: 'The facts of punctuated equilibrium which Gould and Eldredge…are forcing Darwinists to swallow fit the picture that Bryan insisted on, and which God has revealed to us in the Bible.'"

165 posted on 06/10/2003 1:30:34 PM PDT by Lurking Libertarian (Non sub homine, sed sub Deo et lege)
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To: Lurking Libertarian
Darwin had no clue as the the age of the earth. I suspect he would have considered tens of thousands of years for species transitions to be sufficient, given the variations he observed and recorded.

Speed of change is also related to reproduction rate, time between generations, and fecundity. Ten thousand years is longer for rabbits than for elephants.

167 posted on 06/10/2003 1:36:18 PM PDT by js1138
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To: Lurking Libertarian
I guess that since Gould once used the word stasis, that makes me wrong. ;^)
168 posted on 06/10/2003 1:37:46 PM PDT by js1138
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