A Theory In Crisis

A THEORY IN CRISIS (1)

The book by Michael Denton, “Evolution: A Theory in Crisis, is a secular critique of evolution. It is thoughtful, logical, empirical, and well-written. Denton is sympathetic and fair, showing rare insight and compassion towards Charles Darwin. he distinguishes MICRO-evolution form MACRO-evolution. The first occurs within genotypes.

Darwin’s Galapagos finches illustrate micro-evolution, as does the circumpolar overlap among species of gulls, and the many varieties of fruit flies in the Hawaiian islands. However, selective breeding of pigeons, chickens, turkeys, cattle, horses, dogs, cats and many other domestic animals yields similar results over less time.

MACRO-evolution, the second type, had to occur if evolution were to get the first cell, or to leap across genotypes, say, from a reptile to a bird.

While MICRO-evolution is evident in the geographical distribution of many living species (2) and in selective breeding, it sustains only Darwin’s special theory of evolution–variation within genotypes. the general theory, change across types on the other hand, (MACRO-evolution) requires upward rather than lateral movement.

For MACRO-evolution the problem is how fully developed viable life-forms might arise completely by accident. Denton cites Monod who said, “Chance alone is at the source of every innovation of all creation in the biosphere. Pure chance, absolutely free but blind (3). Chance supposedly gave rise to the first organism–perhaps a bacterium, alga, or protozoan. Later, the theory says, chance resulted in complex invertebrates and plants, followed by fish, then amphibians, reptiles, and, finally, mammals.

According to Denton, proof of such a sequence requires at least one of two kinds of evidence: either an unbroken chain of transitional fossils or surviving intermediates, or; plausible reconstructions of such series together with their respective ecological niches.

The trick is to show how each link could be viable enough for the next to get going. Only by establishing complete transitional series can the hypothesized connectedness in the hierarchy of genotypes be made plausible–empirical proof, of course is a much taller order. here the issue is mere plausibility. If such transitions ever happened, intermediate forms should be found in the fossils and in living organisms.

Existing classes should overlap. Clear boundaries ought to be exceptional rather than normative.

Though Darwin hoped fossil transitions would appear eventually, none did. Only trivial cases of micro-evolution, hardly rivaling selective breeding, were evident. Nor for more than a hundred years would any accurate measure of distances between existing classes become possible.

Or, take the Coelacanth. On the basis of fossil evidence, evolutionists believed it was an intermediate between fish and amphibia. reconstructions showed Coelacanth to have both amphibian and fish-like characteristics. Later, live Coelacanths turned up in the Indian Ocean near Cape Province, south Africa.

They were fish! The reconstructions had been wrong. All of which shows that fossils provide a poor basis for detailed inferences about proposed links between classes.

However, Denton points out that advances in microbiology make possible a new sort of evidence. It is now possible to compare directly the basic building blocks–the proteins–of living things. Denton notes that proteins determine “all the biology of an organism, all its anatomical features, its physiological and metabolic functions….(4).” It is hard to believe that protein structure and evolution could be unrelated. Denton writes: The amino acid sequence of a protein from two different organisms can be readily compared by aligning the two sequences and counting the number of positions where the chains differ (5).

And these differences can be quantified exactly and provide an entirely novel approach to measuring differences between species….. As work continued in this field, it became clear that each particular protein had a slightly different sequence in different species and that closely related species had closely related sequences. When the haemoglobin sequences in different mammals, such as man and dog, were compared the sequential divergence was about twenty percent, while when the haemoglobin in two dissimilar species such as man and carp were compared, the sequential divergence was found to be about fifty percent (6).

Such comparisons make possibly the testing of hypotheses, suggested by neo-Darwinian orthodoxy. For instance, suppose bacteria have been around much longer than multi cellular species, e.g. mammals. Suppose further that bacteria are more closely related to plants than fish, amphibia, and mammals, in that order. If so, we should see evidence of these facts in the sequences of amino acids of common proteins. For example, all the mentioned groups use cytochrome C, a protein used in energy production. the differences in that protein should fit an evolutionary sequence. However, bacterial cytochrome C compared with the corresponding proteins in horse, pigeon, tuna, silkmoth, wheat, and yeast show all of them to be equidistant from the bacterium. The difference from bacterium to yeast is no less than from bacterium to mammal, or to any of the other classes.

Nor does the picture change if we choose other classes or different proteins. The traditional classes of organisms are identifiable throughout the typological hierarchy, and the relative distances between them remain similar regardless of hypothesized evolutionary sequences. for example, Denton observes that amphibia do not fall between fish and terrestrial vertebrates. Contrary to the orthodox theory, amphibia are the same distance form fish as are reptiles and mammals (7).

In all comparisons, the hypotheses of general evolution is false.

Denton writes: The really significant finding that comes to light from comparing the proteins’ amino acid sequences is that it is impossible to arrange them in any sort of evolutionary series (8).

The upshot is that the whole concept of evolution collapses (9) [because] the pattern of diversity at a molecular level is unique, isolated, and unlike by intermediates (10). Moreover accidental design adjustments, as necessary for general evolution, are logical disasters. Random mutations from radiation, replication errors, or other proposed sources, rarely result in viable design adjustments, never in perfect more advanced designs.

Evidence for general evolution is altogether lacking and predictions from the theory are false. Darwin confessed the distinctness of specific forms and their not being blended together by innumerable transitional links is a very obvious difficulty (11).

Still he insisted on gradual change due to natural selection which he said can produce no great or sudden modifications; it can act only by short and slow steps (12).

More than a century later the fossil record still does not fit Darwinian orthodoxy. Ironically, by admitting this “trade secret of paleontology” (13). Harvard professor Stephen Jay Gould has achieved fame and glory. From Darwin forward, everywhere in the biological hierarchy researchers came to uncrossed chasms. Yet they pretended the gaps did not exist. This set the stage for Gould’s saltational theory – an idea Darwin explicitly rejected.

Gould’s idea id like the fantasies of Fred Hoyle (14) and Francis Crick (15) about extraterrestrial civilizations. While Gould, along with colleague Niles eldridge, proposes miraculous sudden leaps in evolutionary progress (16), Hoyle and Crick, propose panspermia–life-seeds form some extraterrestrial civilization. All such theories merely postpone thinking. Denton rejects them and concludes that perfect design implies supreme intelligence. But, unlike Gould, Eldredge, Hoyle, and Crick, he does not reach his own proposal by wild imagination, but by a ruthless application of logic.

He notes that the design problem and its solution find a nearly perfect analogy in the difficulty of generating texts in a language. While the number of possible texts is large, the number of nonsensical strings is larger by orders of infinity. It is an understatement to say that the probability of generating by chance even one grammatical text of just a few hundred words is vanishingly small. Any such string implies intelligence.

In the same way, viable sequences of life’s material are an infinitesimal proportion of possible arrangements. The question is how a viable sequence could arise by accident. Denton considers the odds. He cites Hoyle and Wickramasinghe who estimate the chance of a single living cell spontaneously coming into existence as 1 in 10^40,000 tries (one to the 40,0000th power)–“an outrageously small possibility…even if the whole universe consisted of organic soup (17).” Referring then to the “elegance and ingenuity of an absolute transcending quality, which so militates against the idea of chance, ….” he asks: “Is it really credible that random processes could have constructed a reality, the smallest element of which–a functional protein or gene–is complex beyond…anything produced by the intelligence of man?” (18)

In the end, Denton suggests, the advocates of orthodox evolution are like Lewis Carroll’s Red Queen. When Alice protested that there’s no use trying to believe impossible things, the Queen said:

“I dare say you haven’t had much practice…When i was your age I did it for half an hour a day. Why sometimes I’ve believed as many as six impossible things before breakfast.” (19)

REFERENCES

  1. A review of Michael Denton, Evolution: A Theory In Crisis. Denton is a molecular biologist and medical doctor. He’s NOT a creationist and none of his arguments and evidences relate to religious considerations.
  2. the geographical distribution of organisms was, Denton says, Darwin’s main source of inspiration: “the origin of all my views.” See Charles Darwin, the Origin of Species, 6th ed., 1872, reissued in New York: Collier, 1962, p. 25 (as cited by Denton, op. cit., p.45)
  3. Jacques Monod, Chance and Necessity, London: COllins, 1972, p 110 (as cited by Denton, op.cit., p.43).
  4. Denton, op. cit. p.303
  5. Ibid., p. 275
  6. Ibid., p. 276
  7. Ibid., p. 285
  8. Ibid., p. 289
  9. Ibid., p. 291 10 Ibid., p. 290
  10. See Charles Darwin, op. cit., p. 307 (as cited by Denton)
  11. C. Darwin as cited by Denton
  12. Stephen Jay Gould, The Panda’s Thumb p.194 14.Fred Hoyle, The Intelligent Universe & Evolution from Space
  13. Francis Crick and L.E. Oregel, “Directed Panspermia,” Icaus, 19, 341-346, also see Francis Crick, “Life Itself,” simon % Schuster
  14. Niles eldridge and Gould, “Punctuated equilibria: an alternative to phyletic gradualism,” in TJM Schopf, ed, Models in Paleobiology pgs. 82-115
  15. Hoyle, F. “Evolution from space” pgs 24 & 323
  16. Denton, op cit. p. 342
  17. Lewis Carroll, “Alice Through the Looking glass. p 100