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Some
Biological Problems With The Natural Selection Theory
CRSQ Volume 29, Number 3, December 1992
Jerry
Bergman
Abstract
The many difficulties with
the natural selection hypothesis are reviewed, including the problem
of extrapolating generalizations from limited artificial selection research
to megaevolution. Using evolutionary criteria, the hierarchy found is
the reverse of that expected by evolution theory; animals lower on the
evolutionary scale were found to reproduce in greater numbers, and were
as a whole more resistant to variations in the environment. Individual
survival after birth tends to be mostly the result of chance; in most
cases natural selection eliminates only the sick and the deformed. Environmental
variations which cause evolution-temperature, the population of other
animals, and the surrounding plant life, all of which have been fairly
stable for eons-can result in only very limited degree and types of
changes. The natural selection hypothesis also involves circular reasoning;
an extant species survived because it was fit, and must be fit because
it obviously has survived. The commonality of overdesign, or the existence
of complex mechanisms that do not effect survival, but may add much
to the quality of life, also creates a severe problem for the natural
selection theory.
Introduction
One acquainted with the biological
world is keenly aware of its incredible complexities and natural wonders.
As to the meaning of these observations, Macbeth (1971, p. 68) notes,
"Bitter controversies rage over what the demonstrated facts signify,
how they have come about, and why they are as they are." This paper
focuses on the major problems of positing natural selection as the primary
explanation for the complexity and diversity universally displayed in
the living world. The importance attributed to natural selection as a
cause of evolution varies widely. Some students of nature conclude that
it is the only essential causative factor, others that it is of almost
no im-portance. One reason why this divergence of views about the importance
of natural selection in megaevolution exists, Macbeth (1971, p. 42) notes,
is because "We are dealing with something invisible. The operations
of natural selection, real or imagined, are not accessible to the human
eye." By natural selection is usually meant, ". . . the belief
that random variation can, when subjected to selective pressure for long
periods of time, culminate in new forms, and that it therefore provides
an explanation for the origins of morphological diversity, adaptation,
and when extended as far as Darwin proposed, speciation" (Brady 1982,
p. 79). Darwin's definition of natural selection was the preservation
of favorable individual differences and variations, and the destruction
of those which are injurious, and the survival of the fittest (Johnson,
1976, p. vii).
The theory that natural selection
is the major driving force of evolution is based on the fact that not
all conceptions result in births, and only a certain percentage of animals
that are born alive survive to adulthood, and even less are able to successfully
reproduce. It is also assumed that those that survive to reproduce are
more likely to be better adapted to the environment, and are generally
biologically superior. As a result, each generation is assumed to produce
animals that are slightly better adapted to local conditions than the
previous one. Slight genetic mistakes or imperfection called mutations
may result in some new traits. Although most mutations are neutral or
maladaptive, it is believed that a very few may aid a given population's
adaption, and these may eventually change the composition of the gene
pool, slowly producing more and more variety. This process of natural
selection is the means of selecting the best of this variety, causing
evolution. As Gould (1977, p. 22) explains, its force comes from the following
logic:
- Organisms vary, and these
variations are likely inherited by their offspring.
- Organisms produce more
offspring than can possibly survive (many do at least).
- On the average, offspring
that vary strongly in directions favored by the environment will survive
and propagate. Favorable variations will therefore accumulate in populations
by natural selection.
Yet Gould admits that, although
Darwin convinced much of the world that evolution has occurred, the natural
selection concept never achieved much popularity during Darwin's lifetime,
and did not prevail as the putative major cause of evolution until the
1940's.
It now typically forms the
core of modern evolutionary theory (Ayala, 1974). As Johnson (1976, p.
vii) notes, natural selection is no minor theory, but is considered ".
. . so fundamental and outwardly simple that few introductory texts assess
the actual evidence and fewer still describe the methods and assumptions
required of its study." The reason that some of the early evolutionists
had difficulty accepting this concept varied. Ruse (1982, p. 49) notes
that Huxley, the most vocal supporter of evolution in Darwin's day, "always
had doubts about the overall effectiveness of natural selection."
As Ruse (1982, p. 51) notes, the reasons for the resistance to natural
selection include:
It is one thing to accept
selection per se, and it is quite another to agree that selection can
be everything that Darwin claimed for it. There is much drawing back from
selection as an all-powerful evolutionary mechanism, even by those who
were turned into evolutionists by the Origin. The general feeling was
that evolution had to be powered primarily by something else. Many readers
felt that selection working on blind, small variations simply could not
be the causes of the wonderful adaptations like the hand or the eye. Therefore,
not a few of Darwin's contemporaries, primarily for religious reasons,
supposed that the main cause of evolutionary change are instantaneous,
God-designed 'jumps' from one form to another-as from the fox to the dog.
That is, they believed in an evolution powered by 'saltations.'
Ironically, the essence of
Darwin's contribution lies in his contention that natural selection is
the major creative force or source of evolution, not just the executioner
of the unfit (Gould, 1977).
Although many researchers
conclude that natural selection is the major cause of evolution, most
ascribe varying degrees of importance to other factors. Some of these
include chance recombination of existing genes which produce positive,
negative or neutral characteristics (neutral meaning of equal survival
value compared to the parent gene structure), population fluctuations
due to chance factors, geographical factors such as oceans or mountains
which cause breeding isolation, gene flow, and changes in the length of
reproduction and fertility periods. Each of these, separately and in combination
though, are totally insufficient to account for evolution (Williams, 1966).
The best-known major rivals
of the gradual evolution via natural selection model are vitalism, Lamarckism,
mutationism, the neutralists theory (the theory of evolution
by random walk) and Goldschmidt's hopeful monster theory, all of which
have now been largely rejected, although occasionally books surface that
defend one of these theories, especially vitalism and Lamarckism (Ayala,
1974). The hopeful monster idea, in a revised form with a modern cover
called punctuated equilibrium, has recently gained rapid acceptance in
the biological world. Many feel that its acceptance is due less to the
evidence supporting the view, but more because the competing theories
contradict the empirical evidence.
The major concern of megaevolutionists
is to explain the incredible diversity in the living world. Pandas, elephants
and mice are all biologically basically similar, yet manifest many differences.
Even more different are the reptile, mammal, bird and insect and fish
divisions. A viable theory of origins must explain this often unexplainable
diversity, and the fact that literally millions of different species of
animals and plants exist. The explanation that each living type was separately
created by God in the creative week described by Genesis was historically
accepted by most Westerners, and probably most scientists as well, until
the middle 1800's (Gould, 1981). Darwin believed that he had an answer
which was beguilingly simple, and this simplicity partly explained its
rapid and often uncritical acceptance. His answer was that scientists
had for decades misinterpreted what they found in the fossil record: they
actually were examples of animals that were not survivors and from which
today's more perfectly adapted life forms arose. Darwin taught that those
forms that still exist today were better able to survive climatic changes
and the competition for mates, food, air, and space resources, and that
the predecessors of modern forms were generally weaker, smaller, and less
well adapted than other contemporary animals. In short, the extinct forms
were wiped out by what Darwin called natural selection.
Darwin (1958, p. 120) concluded
after he read Malthus' work on population that, ". . . it at once
struck me that under these circumstances favorable variations would tend
to be preserved and unfavorable ones destroyed. The result of this would
be the formation of new species." The forces of drought, wind, animal
predators, cold, heat and disease all tend to kill the weaker animals,
leaving the stronger to reproduce. Since most creatures produce far more
offspring than can possibly survive, "natural" selection can
select the best or most fit, and these then will be likelier to reproduce.
Darwin stressed that only the most fit, the strongest, and the most able
survived the vicious competition for life: only the fastest runners, those
with hardier hearts, better eyes and other sensory organs, stronger or
longer legs (enabling them to run faster), and those with the most effective
means of defense-quills on a porcupine and stink on a skunk- win in the
constant struggle of life. Darwin then went far beyond this truism expounding
that all life, everywhere today and in the past, was created by evolution
and is still evolving by a process that results from a never ending struggle
for survival.
This, in short, is Darwin's
theory of evolution, an idea that was by no means new to Darwin. Gould
(1977, p. 23) claims that,
Contrary to popular belief,
evolution was a very common heresy during the first half of the nineteenth
century. It was widely and openly discussed, opposed, to be sure, by a
large majority, but admitted or at least considered by most of the great
naturalists.
Darwin simply went farther
than most and, importantly, was able to widely popularize the theory.
According to Gould, Darwin's work consisted of uncompromising philosophical
materialism in contrast to other evolution theories, most of which utilized
vitalism or elements of a theistic evolution. Darwin's claim that, except
possibly for the first few life forms, primarily random variation and
natural selection were needed to account for the estimated over 2,000,000
species of animals and plants that now exist.
Much interest existed in Darwin's
time in animal breeding and, in spite of the claim that Darwin obtained
his theory primarily from his observation of the Galapagos Island finches
and Malthus' work, the germ of his idea quite possibly stemmed in part
from the logical deduction that, if we can breed a meatier cow, a faster
horse, a fatter chicken, then we could also produce an even more meaty
cow, a still faster horse, or yet fatter chicken. He then argued, if humans
can bring about such changes in animals, could not nature itself also
be constantly selecting the best by killing the less fit? Is not the bull
that earns the right to breed the most powerful one, the most attractive
peacock the one that has the most right to mate? The major difficulty
that Darwin saw was that the changes obtained by animal husbandry were
small: farmers could improve sheep's wool or make a redder rose, but obvious
limits seemed to exist: Humans could not breed horses from dogs (some
felt they could someday) or wings on dogs (this seemed harder to comprehend,
but not impossible).
Although most biologists of the time concluded that clear limits to change
existed, Darwin believed on faith that no limit existed. As he stated
in his Origin of Species, "I can see no difference in a race that
bears being rendered, by natural selection, more and more aquatic in the
habits. . .and larger and larger] until a creature was produced as monstrous
as a whale." And (1962, p. 63),
Slow though the process of
selection may be, if feeble man can do so much by . . . artificial selection,
I can see no limit to the amount of change, to the beauty and infinite
complexity of the co-adaptations between all organic beings, one with
another, and with their physical conditions of life, which may be affected
in the long course of time by nature's power of selection.
Darwin reasoned that since
many mammals-horses, cows, sheep, pigs, dogs, cats and goats-were all
basically similar (each had a backbone, a brain and skull, four legs,
hearts, kidneys, and similar reproductive systems) if we could breed faster
horses, why could we not breed any mammal (or at least most mammals) from
some common ancestor? After all, as much difference appears to exist between
a poodle and a German shepherd as between a Pekingese and a cat. Darwin
(1962, p. 82, 92) thus developed the opinion that all animals and plants
could vary in any directions to an almost unlimited degree.
That all animals differ slightly,
even from their own brothers and sisters, is obvious; in a litter of cats,
some are slightly larger than others, some are solid white, others darker
in color. Darwinists believed that these slight variations gradually,
almost imperceptibly, could have changed a species into a new one. If
in each generation the slightly faster runners, better jumpers, or stinkier
stinkers were likelier to survive, the future generations of these animals
would run faster and faster, or jump higher and higher. Hitching (1982,
p. 12) concluded,
The idea seem so blindingly
obvious, and so satisfying complete that, in England at least, it quickly
replaced the biblical account of creation, and became a new way of looking
at the living world. With a few hiccups, it has held its place [throughout
the scientific world] ever since.
Support for natural selection
depends heavily upon the validity of its analogy with artificial selection
(Tinkle, 1976). Darwin might have been justified in utilizing the animal
breeding analogy to illustrate a limited process, but the use of natural
selection as the major support pillar for macroevolution is problematic.
In. the first chapter of The Origin, Darwin discusses extensively artificial
selection and extrapolates far beyond what his data warrants (Gale, 1982).
The two major problems with this analogy between artificial and natural
selection include:
1) Almost all the traits that
breeders breed for have nothing to do with survival, and thus nature would
not select for them; we breed dogs for certain appearance traits, horses
for speed traits, cows for milk traits, and chickens for egg traits.
2) Animal breeders have found
that select traits are often lost if random breeding again occurs, or
if breeding for other traits is done. Few if any permanent changes in
the animal usually occur, only the probability of certain traits appearing
is altered.
The problem, both then and
now, was going from the known to the unknown. Humans have produced many
new strains of animals through breeding which have made our life easier
and more pleasant. Although these strains were different in certain major
ways from their predecessors, they usually soon reverted back to the previous
types if allowed to interbreed with them again. Totally new major traits
were never developed, but existing ones were re-arranged and favorable
ones retained so that certain traits were more pronounced. This type of
evolution (if it could be called such) is often termed microevolution,
as opposed to macroevolution. Breeding solid black horses is microevolution,
breeding winged horses is macroevolution. This dichotomy is artificial,
and a clear distinction cannot always be made-and what is now macro may
be classified as micro, meaning possible. Microevolution is what we have
achieved, thus have experimentally verified, and this is probably a more
realistic definition. Macro is what we hypothesize could be achieved,
or which, according to fossil evidence and conjecture, might have occurred
in the past, given a set of assumptions about the fossil evidence.
Now that researchers have
a tremendous amount of experience in breeding animals, it is clear that
it can be carried only to a very limited level, and many traits tend to
revert to where we started-fruit fly traits, after eight to ten generations,
tend to revert back to normal (Tinkle, 1976). The fact is, extensive breeding
by millions of researchers and breeders has not produced a single undisputed
new species in 400 years of experimenting (Johnson, 1991). As Eiseley
(1958, p. 223) noted:
... careful domestic breeding,
whatever it may do to improve the quality of race horses or cabbages,
is not actually in itself the road to the endless biological deviation
which is evolution. There is a great irony in this situation, for more
than any other single factor, domestic breeding has been used as an argument
for the reality of evolution.
Deevey (1967, p. 636) concludes,
"Remarkable things have been done by cross-breeding ... but wheat
is still wheat, and not, for instance, grapefruit. We can no more grow
wings on pigs than hens can make cylindrical eggs." A more contemporary
example is the average increase in male height that has occurred the past
century. Through better health care (and perhaps also some sexual selection,
as some women prefer taller men as mates) males have reached a record
adult height during the last century, but the increase is rapidly disappearing,
indicating that we have reached our limit.
Darwin's error was in stretching
this comparison too far, sooner or later we reach limits, and no one has
yet observed helpful macroevolutionary changes taking place. Since we
do not have several billions of years of direct observation, we have not
been able to directly test this assumption. Nevertheless, some animals
such as fruit flies live a very short period of time, enabling us to observe
multi-thousands of their life generations. Even with a drastically higher
artificial increase in the number of mutations, which are supposedly the
source of variation which gives rise to the "stuff" from which
natural selection can select, no evidence exists that large changes have,
or can, occur (Lester and Bohlin 1984).
Even Gould (-1977, p. 39)
admits ...... although I wear the Darwinian label with some pride, [I]
am not among the most ardent defenders of natural selection" More
blunt is Bethell (1976) who concludes, "Darwin's theory [of natural
selection] I believe is on the verge of collapse. . . . Natural selection
was quietly abandoned, even by his most ardent supporters, some years
ago." Gould, in an article defending natural selection (1977, p.
40-41) admits that, "Bethell argues quite correctly that [Darwin]
relied upon analogy to establish it [his definition of survival of the
fittest] a dangerous and slippery strategy." Yet, many scientists
are still struggling not only to define it, but also to demonstrate that
it has a role in megaevolution (Maddox, 1991, p. 653).
The assumption that all life
and all of its traits owe their existence primarily to natural selection,
thus these traits must be adaptive, is still supported primarily by thought
demonstrations. Natural selection explanations are often similar to dream
interpretations: the explanation may be logical and fully understandable,
yet there is no way to empirically document it. The logic that any particular
character was or might be adaptive was regarded by many as sufficient
proof that it owes its origin to natural selection, but this evolutionary
speculation has few connections with the concrete facts of cytology and
heredity or with actual experimentation.
The Fossils
and Natural Selection
The fossil record does not
support the case for natural selection. One excellent summary (Gliedman,
1982, p. 90-91) reflects the current opinion well:
No fossil or other physical
evidence directly connects, man to ape.... The problem for gradualists
[those who support gradual evolution or orthodox Darwinian evolution]
is that . . . these ancestral species remain essentially unchanged throughout
their million-year life spans, yet each of them differs substantially
from its immediate predecessor. . . . Sudden-change theorists find plenty
of support for their point of view in the glaring list of critical evolutionary
events that no gradualist, including Darwin, has ever explained satisfactorily.
In addition to the lack of a missing link to explain the relatively sudden
appearance of modern man, gradualists cannot easily explain the mysterious
'Cambrian explosion' 600 million years ago. This was an evolutionary leap
that transformed the earth . . . from a mess of simple microscopic bacteria
and blue-green algae to a planet bursting at the seams with primitive
representatives of every type of multicellular plant and invertebrate
animal-from the lowly protozoans to such complex creatures as the trilobites,
... the best that gradualists can do is point to the ground beneath their
feet; the fossils buried in the earth somewhere, they say, and may someday
be discovered.
The lack of transitional forms
is a serious problem that can no longer be attributed to hypothesized
undiscovered fossils (Johnson, 1990; Gould, 1989). All of the multi-millions
of fossils so far discovered fit quite well into existing groups and rarely
is it even argued that a fossil type fits between two orders or even families.
Animals have come and gone, but very few of them meet even the minimal
requirements necessary to claim that their fossil type is one of the many
billions of different transitional forms that must have existed if the
gradualist view is correct. To explain this difficulty, believers in the
punctuated equilibrist's view of Gould postulate that relatively few links
exist, and very few fossils can be found because the rate of evolution
during the gaps was geologically rapid. The theory also argues that the
transitional forms were highly unstable, thus rapidly died off, leaving
behind very few fossils. But once an animal was in a stable slot in the
environment, though, it existed for long periods of time consequently
leaving behind many more fossils during this stage.
The major problems with the
punctuated equilibrium view is that it is based on almost a total lack
of transitional forms; consequently one might ask, "How do we know
that these creatures existed and were unstable if we have no evidence
of them?" The reason that this is concluded is if they were stable
and survived for long periods of time, we would have abundant evidence
of them. Since we do not have this evidence, given evolution is true,
they must have existed, but only for a short while and this is why no
evidence of them now exists. This argument from lack of evidence is, at
best, misleading and, at worst, involves the circular reasoning fallacy.
In the punctuated equilibrium view, multi-millions or more transitional
forms must also exist, just fewer than in the old view. Arguing primarily
from lack of evidence is also true of the gradualist model: none of these
links have been discovered for certain. Hitching (1982, p. 40) concludes
that:
Today most museums and textbooks
accept gradualism as readily as they accept natural selection. Logically,
then, the fossil record ought to show this stately progression. If we
find fossils, and if Darwin's theory was right, we can predict what the
rock should contain; finely graduated fossils leading from one group of
creatures to another group of creatures at a higher level of complexity.
The 'minor improvements' in successive generations should be as readily
preserved as the species themselves. But this is hardly ever the case.
In fact, the opposite holds true, as Darwin himself complained; "innumerable
transitional forms must have existed, but why do we not find them embedded
in countless numbers in the crust of the earth?" Darwin felt though
that the "extreme imperfection" of the fossil record was simply
a matter of digging up more fossils. But as more and more fossils were
dug up, it was found that almost all of them, without exception, were
very close to current living animals. Size and shape may have varied,
such as the woolly mammoth compared to elephants today, but the variations
were small.
Fossil intermediates are consistently
missing in virtually all of the, most important places, and some paleontologists
argue that no true, major transitional forms have been shown to exist,
and that all claimed transitional forms are, at best debatable. Macroevolutionists
generally concede that, although the evidence for intermediates is at
present limited, they have faith that they will be found in the future
if we just keep digging. The limited evidence, such as the few hypothesized
transitional form claims as Archaeopteryx, often do not stand under examination.
Archaeopteryx is probably the best-known and oldest example of a supposed
intermediate, and the creature's traits, as well as where it fits in the
fossil record, are still being hotly debated. Benton (1983, p. 99) concluded
that "no consensus on Archaeopteryx" exists, and that scientists
are still debating even such basic questions as, "can the bird fly,
is it ancestral to birds, did it originate from dinosaurs or from some
earlier stock and, indeed, is it even a bird?" He (1983, p. 99) quotes
a detailed study on the brain case of Archaeopteryx that concludes that
the "details of the brain case and associated bones at the back of
the skull seem to suggest that Archaeopteryx is not the ancestral bird,
but an offshoot from the early avian stem." The relationship of Archaeopteryx
in the origins of bird controversy is so controversial that Thulborn and
Hamley in an extensive review identified seven hypotheses concerning the
affinities of Archaeopteryx (Benton, 1983, p. 100).
This notorious lack of transitional
forms is not due to any shortage of fossils. Billions have now been unearthed,
so many that quality specimens are often sold to collectors for as little
as a quarter. Petroleum, oil, natural gas, chalk, cement and many other
petrochemicals and minerals are claimed to be products of fossils, thus
are called fossil fuels or minerals. Over 250,000 different species of
fossil plants and animals are known to exist, and almost all of them are
extremely similar to the 1.5 million species now known to be living on
earth (and about one million of these are insects) while the rest fit
into known extinct types (Day, 1989). When a fossil is unearthed, it most
always is known type. Discovery of a new species, whether extant or extinct,
is a once in a lifetime event for many zoologists that is often rewarded
by naming the species after the discoverer.
Rensch (1959) admitted that
few, if any, examples of micro changes (which he calls transpacific evolution)
exist in the fossil record. He added hopefully that finding intermediates
in the future should not yet be regarded as impossible. Most research
areas along this line have turned out to be dead-end roads which have
diverted biologists from other far more promising areas of research. Darwin's
explanation for the lack of transitional forms, the alleged extreme imperfection
of the geological record due to our poor search efforts, can no longer
be used to explain away the evidence. We now have enough fossils to be
assured that we have a fairly good idea of the variety of past animal
life, especially those types with hard parts. We can even make some reasonable
conclusions about the extinct forms and variety of animals, such as jelly
fish and bacteria, which are not preserved either as well or as often
as animals with hard parts. Our good knowledge of many ancient insects
is partly due to the many types that are preserved in amber or other substances
which prevent the decay of the soft, fragile parts (Reid, 1985). These
were described eloquently by Zahl (1978, p. 237):
Recently, in a laboratory
at Harvard's Museum of Comparative Zoology, I focused a magnifying glass
on a clear marble-sized sphere in which a tiny fossil fly hung suspended....
This elegant piece of tea-hued amber, along with its elfin inclusion,
was only one of several thousand stored in drawers stacked from floor
to ceiling in the Museum's Department of Fossil Insects. . . . In each
was a fly, ant, grasshopper, beetle, or spider, all perfectly lifelike
as though some magic wand had cast the spell of frozen sleep upon them....embalmed
you might say, fifty million years earlier; yet its tenants looked singularly
like the fly, ant, grasshopper, beetle, or spider in my own garden. Had
evolution overlooked such genera during the intervening fifty thousand
millennia?
Trilobites, although long
extinct, have been studied extensively and we now know a great deal about
the morphology, growth, molting, appendages and internal anatomy of the
60 known species. We even have good insight into how their holochroalic
eyes work. Enough is known about the past living world to produce a fairly
good picture of it. And, this picture precludes macroevolution.
Natural selection, although
it "explains" minute changes, is far less viable in explaining
the events called for by the theory of punctuated equilibria. Many of
the challenges to Darwinian evolution are specifically challenges to natural
selection. And these are such that the theory at the very least requires
severe modification (Leigh, 1971). As Hitching (1982)
stated, "Darwin's explanation
of evolution is being challenged [today] as never before, not just by
creationists, but by his fellow scientists." The fact is that: .
. . for all its acceptance as the great unifying principle of biology,
Darwinism, after a century and a quarter, is in a surprising amount of
trouble." The reason is because Darwinism or its modem version, neodarwinism,
". . . has not, contrary to general belief, and despite very great
efforts, been proved." Given the above, why then is natural selection
accepted? Macbeth (1971, p. 77) attempts an answer:
[Does] the evidence mean that
Darwinism is correct? No. Sir Julian Huxley said, once the hypothesis
of special creation is ruled out, adaptation can only be ascribed to natural
selection, but this is utterly unjustified. He should say only that Darwinism
is better than the other. But when the others are no good, this is faint
praise. Is there any glory in outrunning a cripple in a foot race? Being
best-in-field means nothing if the field is made up of fumblers."
That changes have occurred
in nature and in animals, no informed person doubts. Nor does anyone deny
that species have arisen and disappeared-the dinosaurs and trilobites
are the most prominent of thousands of good examples. Many creatures that
once roamed the earth no longer exist today, and some species around today
evidently did not exist a long time ago. The concern is that microevolution
is labeled evolution, then based on the evidence for microevolution the
claim is made that evolution has occurred. Microevolution has been well
documented and creationists have no difficulty with this fact; they stress
that we should go only as far as the empirical data carries us (Johnson,
1991). The fact is, the documented changes are minor and fully explainable
by innate,variation laws. Most creatures that are around now are close
to identical to their ancestors who lived far back in time-some even from
almost the very beginning of the fossil record, such as many types of
bacteria, insects, jelly fish, reptiles and fish.
Natural Selection
and the Origin of Cells
A long standing major difficulty
with the selection hypothesis relates to the hypothetical earliest levels
of evolutionary development. For selection to occur, a living organism
must exist that is capable of successfully reproducing, and also of ingesting,
assimilating, and processing food. Secondly, a stable supply of food must
be available which it can use to manufacture the various complex elements
and also produce the chemical reactions necessary to obtain the energy
needed to insure the organism's survival. Although many have tried, explanations
of the origin of single cells by selection theory are still wanting. For
selection to take place, even at the cellular level-a structure consisting
of dozens of complex interrelated, functioning organelles must first exist.
Many complex subcellular structures must somehow spontaneously form in
conditions much different from today, and then resist the push toward
entropy. Most all would disintegrate, but evolutionists must assume that
some did not. These few must also have had a means to prevent destruction
by too rapid atrophy, and also, among other things, must be able to ingest,
to respirate, and also to effectively reproduce. Only when all of this
has occurred could selection select the animal which survived best and
produced more offspring.
Reproduction
Rates and Bacterial Evolution
The organism which had a highly
effective reproductive system and a longer reproductive life span to produce
more of its offspring would be favored. A major result of the survival
of the fittest force would be the length of the reproduction period, an
effect that Darwin called differential mortality and today is often called
differential reproduction. No selection advantage exists in living after
one can no longer reproduce:
We must keep always in mind
that by the 'fittest' Darwin meant the one with the largest surviving
progeny. This can be and often is a comparatively weak individual. In
this sense rabbits are 'fitter' than lions, since they have been able
to reproduce and occupy a larger area, in spite of man, than lions, which
are fighting a losing battle against man. (Solbrig, 1966, p. 9) Differential
reproduction is so important that, in Simpson's (1967, p. 138) words:.
Suppose all the individuals
in the population lived for precisely the same length of time, with no
elimination of the unfit ... hence no Darwinian selection. . . . Suppose
further that [one species had] a hereditary fondness for apples [and]
had twice as many offspring as those without this characteristic. Then
there would be very strong, clearly non-Darwinian selection.
Given the fact that small
mammals tend to have different survival rates, it would seem the one that
consistently had the largest litter would eventually dominate the others.
Put another way, given two identical animals except that animal A has
an average of 10 litters of four animals each during its reproductive
lifetime, and the other an average of six litters with three animals each,
this trend would eventually result in animal A predominating and the demise
of animal B. Evolution would therefore seem to consistently select for
longer reproductive lengths-first years, then centuries, etc.-presumably
without limit, although increases could well be smaller and smaller as
time progressed, similar to the half-life phenomena. Obviously, this has
not happened. Natural selection would, in short, favor primarily those
animals that 1) produce more offspring, 2) have longer fertility periods,
3) and live longer, thus having more time and opportunity to reproduce
their kind. Those that on the average live longer but have shorter fertility
periods are, according to evolution, at a disadvantage in the long run.
These three factors all facilitate the events which fit the standard definition
of "survival of the fittest." The data as a whole also reveal
that natural selection is not functioning to any significant degree anywhere
so as to change these features. According to the current evidence, the
number of offspring, longevity, and length of the fertility period of
most animals have been remarkably stable for the past several thousand
years (Prince, 1980; Tributsch, 1984; Johnson, 1991). Since natural selection
has evidently not changed even these three simple characteristics very
much, all of which would seem to be highly influenced by it, the mechanism
would not be expected to select in the direction of developing extremely
complex mechanisms for animals, such as those found in the bombardier
beetle or the archer fish. Conversely, it would select structures which
directly or indirectly facilitate that which is defined as evolutionary
sucess, namely the number of offspring living at any given time. As Miller
and Van Loon note:
it gradually became apparent
... that the influence [of natural selection] was much more subtle, and
that it was more a question of differential reproduction rather than differential
survival and that what counted was not so much the life or death of certain
individuals, but the extent to which any particular type could outbreed
its competitors. (1982, p. 169)
Measured by this standard,
because some insects give birth daily to thousands of offspring, they
are for this reason far more successful evolutionarily speaking than mammals,
most who give birth to only a few offspring annually. Actually, a major
problem with the survival of the fittest theory is that reproductive rates
often are the opposite of what evolutionary theory predicts. Animals that
have supposedly evolved to the highest rungs on the evolutionary ladder
in terms of the number of changes from the original hypothesized unicellular
ancestor often have the lowest reproduction rates (Ortner, 1983). Most
mammals give birth to one or two litters for only a few mating seasons.
Many female mammals, if impregnated, have only one or two offspring per
mating season. The creatures on the bottom of the so-called "evolutionary
scale," such as bacterium and viruses, have by far the highest reproduction
rates. If reproduction fecundity is a main criterion of evolutionary "success,"
bacteria and viruses are without question among the most successful living
organisms. Cholera bacteria reproduce at such a rate that a single pair
can produce an estimated 700,000,000,000, 000,000,000 (700 quintillion)
offspring in a mere 24 hours, fully 3,000 tons worth. Further, an offspring
reproduction rate such as this would seem to provide an almost inexhaustible
gene pool for mutations. Thus, if so many mutations occur per 1,000,000
organisms, the higher the number of organisms, all other factors being
equal, the greater the total amount of mutations (and the more mutations,
the greater the probability of a orable ones). The far higher reproduction
rate of bacteria coupled with their short life span would result in more
offspring and more total generations per year. Given this, they would
produce far more mutations than the majority of animal types and, therefore,
have the greatest chances for the occurrence of a favorable one, thus
evolution.
It would also seem, given
evolutionary assumptions, that a state of equilibrium would never occur
among bacteria. A few bacteria out of the multitrillions living at any
one time are bound to be blessed with a difference that produces a slight
selection advantage which could in turn gradually alter the entire gene
pool. The result would seem to be a greater likelihood of improving their
adaption state, and thus should have caused it to evolve to a "higher"
evolutionary level. The weaker bacteria forms would eventually become
extinct, and only if new bacteria were somehow "spontaneously generated,"
or life at an even "lower" level was occasionally formed and
able to evolve to the higher bacteria level, could this type continue
to exist. If so, the bacteria existing today would have to be a recent
result of this progress. Research on natural selection and mutations as
a variation source has recently found that frequencies of genes that control
certain traits of some microorganisms can be influenced. We have by this
means, though, not yet produced a single major beneficial change in the
physical structure of any organism, only weeded out undesirable one (Lester
and Bohlin, 1984).
Although bacteria should have
evolved at a much faster rate then the "higher" animals, no
evidence exists that they have undergone evolutionary change in recent
(or even ancient) history. The so-called Archae bacteria are not a pre-
or primitive bacteria such as their name implies, but only ". . .
a distinct and separate group of prokaryotes," and even this claim
is a matter of definition and debate. The earliest bacteria thus far discovered,
estimated to be two billion years old, ". . . closely resemble the
microcolonies of certain modern soil bacteria" (Schopf, 1965, pp.
1365-1366). Borchgrave (1988, p. 62) noted that an Oberlin College team
of biologists concluded that the evidences which they found:
... indicate that the single-celled
organism without nuclear membranes has changed little since it originated
2 billion years ago. The organism ... has several of the same characteristics
as today's myxobacterium, found in abundance in soil. The size of the
slime's cells, its spores and the cysts that house the spores appear to
be similar . . .[to] the myxobacterium of 2 billion years ago, like its
present-day counterpart, was not photosynthetic but instead derived its
energy from organic compounds of decomposed materials in the stromatolites.
The enormous reproduction
level of bacteria noted above does not occur due to a rapid depletion
of available food and moisture, and also an accumulation of toxic metabolic
waste products in the animal's environment. Yet, the sheer number of bacteria
produced should eventually result in mutations that will enable them to
overcome even these problems. Evolution predicts that the organisms will
eventually evolve so that their own waste products were not toxic. They
might be expected to evolve selective membranes, toxic neutralizers or
another means to protect themselves against the poisons. If bacteria have
existed on earth for two-billion or more years-longer than most every
other living thing-plenty of time should have been available for the necessary
mutations to have occurred. As zoologist Grasse (1977, p. 87) notes, the
question of why they did not evolve these innovations poses a major problem
for evolution:
Bacteria, . . . are the organisms
which, because of their huge numbers, produce the most mutants. This is
why they give rise to an infinite variety of species, called strains,
which can be revealed by breeding or tests. Like Erophila verna, bacteria.
. .exhibit a great fidelity to their species. The bacillus Escherichia
coli, whose mutants have been studied very carefully, is the best example.
The reader will agree that it is surprising, to say the least, to want
to prove evolution and to discover its mechanisms and then to choose as
a material for this study a being which practically stabilized a billion
years ago! What is the use of their unceasing mutations, if they do not
[produce evolutionary] change? In sum, the mutations of bacteria and viruses
are merely hereditary fluctuations around a median position; a swing to
the right, a swing to the left, but no final evolutionary effect. Cockroaches,
which are one of the most venerable living insect groups, have remained
more or less unchanged since the Permian, yet they have undergone as many
mutations as Drosophila, a Tertiary insect.
Another of the thousands of
examples that illustrate why mutations have been unable to bring about
major changes is illustrated by yeast cells. The process needed to manufacture
many alcoholic beverages involves using yeast to produce carbon dioxide,
alcohol (both yeast cell waste products) and the energy necessary for
its own growth, all from the fruit on which it parasitically lives. But
when the alcohol content reaches about 14%, the yeast's own waste product
begins to kill the yeast. The many millions of years that evolutionists
believe is available has not been able to overcome this simple problem.
Similar examples of this inability of evolution by mutations to overcome
limitations abound in the worlds of viruses, mycoplasms, rickettsia, fungi,
nematodes and even class insecta.
Mutations and
Evolution
Mutations are usually viewed
as the major source of the variation that natural selection selects to
cause evolution. It is universally recognized that the vast majority are
clearly neutral or harmful, most always resulting in no change or a weakened
or even deformed creature (Williams, 1977). Goldschmidt (1942) who postulated
an early punctuated equilibrium theory, observed mutations in fruit flies
for many years. The changes, he lamented, were almost all small so that
if a thousand mutations were combined in a single fruit fly, a new species
would not result but, at most, only a weird fruit fly which probably would
not survive birth (Goldschmidt, 1952, p. 94). Extremely few examples exist
for which any case can be made for a major favorable result from a mutation,
and even these few examples are debatable. Even the assumption that weakened
or deformed creatures are far more apt to be eliminated by natural selection
is not valid; weaker creatures are often eliminated only if they are so
severely deformed that they cannot live. Many spontaneous abortions and
early infant deaths are due to this factor. Inferior creatures, especially
among the higher mammals such as the primates are often protected by the
group and, consequently, not uncommonly survive. Medicine has improved
tremendously the infant mortality rate, and consequently many of the "weak"
humans who would normally not survive are now living as long or beyond
the normal life expectancy. A defect in humans, to be of selection value
often must be so great that it causes the individual with it to be highly
unlikely to survive the child bearing years, let alone compete in the
natural selection game.
The discovery of the mechanism
of heredity by Gregor Mendel in 1866, and the extant research on mutations,
gives clear evidence mostly for deevolution. If the creature survives
a mutation which is not harmful enough to impede early survival, it will
likely be passed on to one's offspring. In this way, all species slowly
accumulate mutations with each passing generation. Some evidence exists
that the number of natural mutations has been increasing in humans, causing
more diseases such as hemophilia (bleeding disease). Over 4,000 diseases
are now known that are caused by past mutations, most of which were not
in the human family several thousand years ago. Their victims have survived
long enough to reproduce and pass on what was likely a mutation to their
offspring. This is evidence, though, for deevolution, the opposite of
evolution. As Mayer (1964, p. 296) admits, it
... is a considerable strain
on one's credulity to assume that finely balanced systems such as certain
sense organs (the eye of vertebrates, or the bird's feathers) could be
improved by random mutation. This is even more true for some of the ecological
chain relationships (the famous yucca moth case, and so forth). However,
the objections of random mutations have so far been unable to advance
any alternative explanation that was supported by substantial evidence.
The inadequacy of arguing
from reasoning that an idea is valid because it is a "better explanation"
compared to competing ones, Macbeth (1971, p. 78) explains as follows:
If such a theorist makes a
suggestion that is better than other suggestions, or better than nothing,
he feels that he has accomplished something even if his suggestion will
obviously not hold water. He does not believe that he must meet any objective
standards of logic, reason or probability. This is a curious state of
affairs, but if the reader ... can view it as a possibility he will feel
less surprised in the frequent cases where he finds the theorists propounding
ideas of striking frailty.
Attempts to
Rank Animals by an Evolutionary Scale
The "higher" or
"lower" (or more or less evolved) classification used by evolutionists
is a distortion of reality and for this reason is avoided by informed
biologists. Animals clearly appear to be designed for a certain type of
life, and each one "fits" quite well into its own habitat. The
severe difficulties in "ranking" animals in an evolutionary
hierarchy, given the limitations of molecules and the built in flexibility
found in all living structures, from cells to organs (plus the fact that
all of them are perfectly designed and every organ perfect if not diseased)
has resulted in a new taxonomy system called cladistics (Duncan and Stuessy,
1984). All organisms face the same needs, and all are normally capable
of doing what is necessary to meet these needs. A luxury airplane is not
necessarily more fit or better able to fly tfian a small Lear jet; both
are well designed for their respective purposes.
Comparisons made between humans
and animals show that many of the so-called "lower" animals
are more "highly" developed in some areas than humans. A 170
pound man expending energy at the rate equivalent to that of a ruby throated
hummingbird would burn about 300 thousand calories daily, requiring consuming
285 pounds of hamburger, about double his weight, daily. He would also
need to evaporate about 100 pounds of sweat each hour just to keep his
skin temperature slightly below the boiling point of water. Hummingbirds,
famous for their speed, can fly about 60 miles an hour. They also can
effectively "hover" like a helicopter, a feat which requires
a wing movement of over 200 beats per second (a speed which cameras could
not freeze until the advent of high speed film). For this reason, their
wings appeared blurred in most older photos. The extremely fast wing movement
also enables them to fly backwards, sideways or in any direction that
they wish (Gause, 1969).
Although it is well-known
that the "simplest" living things are actually extremely complex,
the supposedly oldest living things are also as fully "developed"
as their modern counterparts. These microfossils of cell chains that resemble
a string of beads were discovered in rocks collected from a desolate corner
of Western Australia. Paleobiologist Schopf (1965, p. 1365) noted that
these bacteria-like organisms that lived at the bottom of the shallow
sea were "surprisingly complex." In his words, ". . . these
microfossils tell us that life was a whole lot more complex at that time
[three and a half billion years ago, only about a billion years after
the earth was supposedly formed] than any of us had really guessed."
At least five fossil varieties of this type of bacteria were identified
by the team of scientists which gathered at UCLA to argue about their
origins of life views. They further concluded that this discovery also
indicates that life existed a ". . . billion years older than expected."
This leaves much less time available for life to have arisen after the
earth began. Over 80 percent of the four and a half billion years of the
earth's assumed existence (at least three and a half billion years) contained
life, an assumption which creates serious problems for evolution.
The Case of
Insects
Insects are also near the
bottom of the evolutionary scale, but are likewise extremely successful
according to evolutionary criteria. Almost a million species are now known,
and hundreds of new ones are being discovered each year-this compares
to less than 36,000 types of mammals, fish, and birds. Farb (1962, p.
11) estimates that the total number of insect species may reach
upward of one million, and
one authority believes the number may be as high as ten million. But even
now the total already known is about three times the number of all other
animal species on the Earth combined. There are reasons for the high level
of success of insects.
Some of the many reasons for
their obvious success, including their incredible ability to live in a
wide variety of inhospitable environments include:
There is scarcely a place
on the planet Earth that is not home to least one kind of insect. Some
40 kinds of insects live in the bleak Antarctica.... Wherever they live,
insects . . . endure with a unique kind of indestructibility. Some of
them have been frozen solid at temperatures more than 30 degrees below
zero F and still lived; other kinds inhabit hot springs where temperatures
reach 120 degrees F. Still others survive in as great a vacuum as man
has the power to create.... many insects can endure long periods without
water; they possess fuel reserves and can get the water they need by burning
these reserves. This is so-called metabolic water; it is produced by the
burning of carbohydrates in the body, where they are broken down into
water and carbon dioxide. (Farb, 1962, p. 11)
The flea is an excellent example
which illustrates how many insects, in contrast to most vertebrates, can
tolerate drastic environmental changes. Fleas can typically survive for
as long as 17 months without blood, their main diet, until they find a
host. One flea type which preys on humans can exist as long as 500 days
without nourishment. Of the 1,200 species of fleas that exist (only about
200 make their home in North America) some types can exist in a frozen
state for months and, after thawing out, are usually as healthy as before.
After being buried under thick layers of snow in the frigid Antarctic
for as long as nine months or more, as soon as they are freed they look
for a "host" on which to survive parasitically.
After the infant fleas hatch,
they spin cocoons in which to grow and mature. Then, after becoming fully
developed, they lie dormant within their cocoons patiently waiting for
a person or animal to pass by. When one is discerned, usually by smell,
the flea bursts rapidly from its cocoon and "jumps" onto the
host if it is within 36 inches (proportionate to a human jumping about
550 feet). The flea, known for its great strength, can pull 400 times
its own weight. Farb (1962, p. 22) notes that fleas are remarkable, but
no living creature matches the beetle, the most successful order of animals
on earth:
... the total number of beetle
species may be as high as 250,000. . . . By comparison, all the species
of vertebrate animal-fish, amphibians, reptiles, birds and mammals-total
fewer than 36,000. At least three characteristics contribute to this unparalleled
success. . . . Complete metamorphose ... an effective shield, protecting
the soft body underneath and the beetles have kept their primitive mouth
parts, designed for chewing abundant soft foods.
These examples vividly illustrate
the difficulty in developing an evolutionary hierarchy as required by
the theory. Rather than a classical tree relationship as among animals,
we find a variety that defies any overall ranking system.
Intelligence
and Survival
The brain becomes more and
more complicated as we go up the animal kingdom scale. Vertebrates, animals
with spines, have more nerves than spineless creatures, and their brain
is larger and more complex. This enables vertebrates to effectively carry
more messages from its more complex body to its brain, which in turn must
be more complex to deal with this quantity and quality of information.
The brain and most of the body structures in "higher" animals
are far more complex, requiring many more neurons and their supportive
neuroglia cells. This complexity does not necessarily increase the animals
survival advantage, but it often actually makes survival more precarious
because more structures exist to break down. Animals with more complex
brains are also often less able than lower forms to withstand some of
the major environmental pressures that supposedly originally caused their
evolution, especially temperature and food supply pressures (Colinvaux,
1978).
Contrary to what is often
assumed, intelligence does not necessarily facilitate survival, at least
in the animals below humankind (Colinvaux, 1978). The term intelligence
is used here in the classical sense, and does not refer to inherited instincts,
without which almost no animal could survive. Many animals which have
almost no intelligence survive quite well, including bacteria, insects,
coelenterata, platyhelminthes (flatworms), aschelminthes (roundworms),
mollusca, and crustaceans. Conversely, any animals which possess a comparatively
much higher level of intelligence, such as whales, dolphins and many primates,
are now threatened with extinction. With the exception of humans, a reverse
correlation often exists between the ability to survive and intelligence.
One of the most successful
animals from an evolutionary standpoint, the turkey, is considered one
of the more inept members of the animal kingdom. When frightened by thunder
or other loud noises, they sometimes pile up on top of other turkeys along
their coop fence and smother. They will even drown in their own water
trough or stare up at the sky during the rain storm with their mouths
agape until they suffocate! Although mankind is partly responsible for
this condition because turkey breeders are concerned primarily with size,
and certainly not with intelligence, those in the wild also exhibit most
of these traits. Turkeys may have survived until today partly because
the stiff horny spurs on the back of their legs are a fairly effective
defense against predators, and their mating process is very efficient.
In addition, they display unique behaviors such as creating small "dust
storms" which kill lice, mites, and other parasites that are prone
to live in their feathers. The dust blocks the breathing organs of the
parasites, killing them. Regardless of the reason, in spite of being dangerously
stupid, turkeys actually live longer and are hardier than many other birds
(Masckenzie, 1977).
Claims that temperature and
similar environmental factors caused the evolution of human intelligence,
which in turn has aided in our survival, are common in the literature,
but are often nothing more than speculation. Pendell (1977, p. 76) for
example, proposed that: "The population of Homo erectus in Europe
must have been thinned to almost zero by the Mindel Glaciation. Only the
few who boasted an almost Homo sapiens intelligence could have survived."
This conclusion is largely guesswork which lacks empirical evidence and
is also poorly conceived intellectually. Those specimens that survived
this ice age did not need intelligence nearly as much as a good supply
of food, firewood and animal skins, plus access to warm caves and the
insight to huddle together under thick blankets by the fire. If a few
of them possessed reasonable intelligence, they could likely have directed
the process of locating food and the other necessary things for the whole
tribe, or better yet had known to move south as the climate changed. Humankind
has most always lived in groups and, with some notorious exceptions, has
always taken care of the weaker among them. The children must be cared
for by adults and, except in extreme cases, rarely perish because of their
lack of intelligence. If lack of intelligence impedes survival, it is
often the group's or the tribe's leaders' lack that causes most of the
problems. The high level of group and social support systems that are
typical of primates makes it unlikely that much winnowing out of the less
intelligent generally occurs. We would also expect that the lower forms
of life would display a low level of tolerance for variations in such
factors as temperature or lack of regular food and water, and would need
only certain kinds of food to survive. Darwinian natural selection would
also cause us to expect that those organisms at the higher end would possess
better, often more complex organs which would help them to survive by
blessing them with a greater ability to:
1. live for longer periods
of time without food.
2. live on a wider variety
and types of food (animals that metabolize most anything are ideal).
3. live on food types that
are abundant (as cellulose).
4. live in large temperature
variances (such as from 0 to 300 degrees Celsius, or close to these extremes.)
5. resist or develop tolerance
to many poisons, ions, acids and bases from a pH of 2 to 12 or wider,
etc.
6. effectively escape or defend
themselves against predators of all types and sizes.
According to these criteria,
the so-called simpler forms of life tend to be more evolved. As the law
of parsimony (Occam's razor) predicts, if two structures equally achieve
the same results, the simpler structure (or simpler explanation) is preferable.
A simpler structure has fewer parts to wear out or malfunction, and thus
cause a breakdown. A clear technology advance is the development of a
machine which does the same job with fewer parts, especially fewer moving
parts, or with a less complicated design.
An example is the so-called
simpler eyes of insects or ears of certain animals which are more effective
than the same structure in humans. This fact questions the purpose from
an evolutionary standpoint of more complex structures. If a motorcycle
will transport one to the next town as effectively and quickly as a Cadillac,
natural selection will not evolve a Cadillac, even though this mode of
transport may be much more comfortable and luxurious. The functions of
life, growth, survival, and reproduction are all carried out as effectively
if not more so in bacteria, insects and worms as in humans. The major
difference is that humans travel through life with more luxuries. This
concept, called "over-design," supports for the creation world
view (Bergman and Howe, 1990).
Greater and greater ability
to survive in spite of food deprivation would seem to be a major thrust
of Darwinian natural selection. Presumably, the only limits are the ability
to survive total deprivation, and to stop and start one's total biological
system at will. That it is possible is proven in that some animals can
evidently survive for centuries in a state of extreme hibernation without
food or water. DeGarmo (1982, p. 19) reported that bacteria brought by
ship from earth, Streptococcus mitis, apparently survived on the moon
surface between April 1967 and November 1969. The organisms were discovered
in a piece of insulating foam in a television camera retrieved from Surveyor
III by the Apollo astronauts. The ability to withstand greater and greater
temperature and other environmental changes, which would be determined
by the general ranges which exist in an area, also would evolve. Thus,
no need exists to evolve the tremendously complex organisms with the endless
variety of sense organs, communication and systems of locomotion that
are found everywhere in the real world, both today and far back in the
past. Selection would seem to eventually cause the evolution of the most
possibly fit animal (likely a single-celled organism) which would eventually
literally cover the earth, impeded only by space and the availability
of food-both which would affect only its ability to reproduce. Even here,
though, selection would increase its food flexibility requirements to
the extent that the cell could exist on only oxygen, carbon, nitrogen,
and trace amounts of a few other elements. The fact that this logical
outcome of evolution is not found argues against megaevolution by natural
selection.
The Limits of
Variation
Empirical research has verified
that animals and plants can be bred only to a certain point. Important
economic reasons exist behind attempts to breed prettier flowers and meatier
cows, but nowhere are small improvements as critical as the breeding of
faster race horses. At stake is many millions of dollars which can be
gained even if the breeding produces only a very small advantage. Hill
(1988) in a study of horse breeding concluded that, in spite of enormous
efforts by the leading geneticists, race horses today do not run much
faster than their great-great-grand-sires did, and many of the mprovements
"cannot be attributed to genetic change, but to better training,
health, tracks, and wider screening of the population.' He notes that
"despite the efforts of breeders," the winning times of thoroughbreds
in the English classic horse races "have not fallen substantially
over the past fifty years" (1988, p. 678). This is not due to lack
of effort, but "the lack of improvement is disturbing because the
horse-breeding industry is a large and competitive business, with much
attention being paid to performance and to pedigree . . . we need to explain
the apparent selection limit . . ." (1988, p. 678). While it would
be premature to conclude, especially in view of genetic engineering progress,
that the industry has exhausted all possibilities of breeding a faster
horse, it is clear that there are definite limits which are fairly narrow.
Breeding a slightly faster horse does not argue against this, only that
the limits may be slightly wider than we currently assume (Gaffney and
Cunningham, 1988, p. 722). The Gaffney and Cunningham study found that
the best horses were not getting faster, but the pack's arithmetic mean
was higher. Although the gene pool was improv ing, the top horses had
reached their physical limit. Drosophila melanogaster research has found
that excessive breeding of some traits often produced sterility, thus
we could expect that intense natural selection, as repeatedly confirmed
in the laboratory, would result in sterility or other problems, not a
new and better species however it is defined.
Selection as
Counter-Evolution
Numerous other problems exist
with the claim that the animals which supposedly had a longer evolutionary
history and are more complex are the higher forms, such as the mammals,
birds, dinosaurs, etc. and that the lower forms-insects to bacteria-are
"primitive" and have historically experienced little change.
Intensive selection would logically eventually cause the organism's extinction
for the reason that it results in a higher and higher level of adaption,
thus a narrower and narrower level of specialization, making it increasingly
difficult to survive environmental changes. Flexibility and a low level
of adaption to a specific niche appears to be far more important for survival
than a high level of fitness. Natural selection would then "select"
animals into a slowly narrowing ecological niche in which extinction would
be inevitable. The data cited above support the conclusion that animals
which are "higher" on the evolutionary scale are more likely
to become extinct-inferring that Darwinian "selection" tends
to evolve animals into a position in which they are more likely to be
selected out of existence. In other words, Darwinian selection, as presently
understood, almost invariably leads to extinction.
An example of Darwinian natural
selection theory carried to its limits and selecting an animal out of
existence, is the saber-tooth tiger. Its demise is attributed to its large
teeth which evolutionists also claim were originally produced by selection.
Their teeth evolved so large that the cats evidently could not open their
jaws wide enough to allow entry of their normal food. This contradiction
exists, it is argued, because the environmental changes may produce a
structure which is advantageous in one situation but a handicap in another,
and new traits are actively selected for or against if the environment
changes. No known changes in the environment of the sabre-toothed tiger
have occurred to cause this, and both those factors for and those against
the trait would be operating at the same time. Selection must explain
both the existence of these gigantic teeth and the ultimate demise of
the animal (and it is not even clear if they caused the animal's extinction).
It cannot explain these factors for the reason that it can cause only
a fine-tuning of tooth size, not an extreme and, in this case, non-functional
development as Darwinian natural selection teaches.
It is likewise hypothesized
that the Irish Elks became extinct about 10,000 years ago, largely because
of their enormous antlers-a trait that is claimed was originally formed
due to selection. The Irish Elk (not an elk, but the largest deer known
today) lived in Ireland and also as far east as Siberia and China, and
as far south as Northern Africa. Its antlers were probably the largest
of any animal, ever-up to 12 feet long, sometimes longer than the elk's
own body length and weighed about 90 pounds (Gould, 1977, p. 79). It is
assumed that the antlers developed from selection, and nature continued
to select until the animal with them grossly lacked functional body proportions.
Darwin's Concerns
Even Darwin recognized that
the natural selection theory had serious problems. For example, Gould
(1980, p. 32) noted, "Darwin lived to see his name appropriated for
an extreme view that he never held-for Darwinism has often been defined,
both in his day and in our own, as the belief that virtually all evolutionary
change is the product of natural selection." According to Gould,
Darwin openly objected to this "misunderstanding" of his position.
In the introduction of the 1872 edition of his Origins of the Species,
Darwin stated:
As my conclusions have lately
been much misrepresented, and it has been stated that I attribute the
modification of species exclusively to natural selection.... in the first
edition of this work, and subsequently, I placed in a most conspicuous
at the close of the introduction-the following words: 'I am convinced
that natural selection has been the main but not the exclusive means of
modification.' This has been of no avail. (Quoted in Gould, 1980, p. 32)
A major reason that Darwin
took this position, Gould (1980, p. 32) concludes, was because ".
. . organisms display an array of features that are not adaptations and
do not promote survival directly." Darwin attempted to explain away,
or in some way account for these mechanisms, but largely failed and he
knew this. In respect to Homo sapiens, Grasse (1977, p. 85-86) pointed
out that, although the source of selection, namely mutations, differentiate
individuals, yet
... the human species, despite
the magnitude of its population and the diversity of its habitats, both
of which are conditions favorable for the evolution of the human species,
exhibits anatomical and physiological stability. In wealthy western societies
natural selection is thwarted by medical care, good hygiene, and abundant
food, but it was not always so. Today in underdeveloped countries, where
birth and death rates are equally high (tropical Africa, Amazon, Pakistan,
India, Patagonia, some Polynesian islands), natural selection can exert
its pressure freely; yet the human type hardly changes. In the population
of the Yucatan, which since the Spanish conquest has been subjected to
terrible vicissitudes, one can find Mayan men and women who are the exact
replicas of their pre-Colombian ancestors from Palanque of Chicken Itza.
For several millennia the Chinese have numbered hundreds of millions.
The conditions of their physical and social environment have favored intensive
selection. To what result? None. They simply remain Chinese. Within each
population, men differ by their genotype, and yet the species Homo sapiens
has not modified its plan or structure or functions. To the common base
are added a variety of diversifying and personifying ornaments, totally
lacking evolutionary value.
Some Conclusions
For many, a key impediment
to the acceptance of evolution, according to Gould, is that Darwin argued
that evolution has no purpose, but is merely a process which both happens
to result in increased numbers of animal types in the future and improves
their survival chances, and nothing more. Numbers were assumed to be the
only measure of success. The more successful species would have more of
its offspring around; more would be reproduced, and more would survive.
From this vantage point, bacteria are far more successful than elephants,
thus more evolved. In the selectionist's view, any harmony and order in
the world arises solely from an incidental and accidental result of individuals
universally selfishly seeking their own advantage-see Wilson (1975). In
contrast to this view, it is obvious that purpose is everywhere, and one
who asks why in the natural world can usually find empirically supported,
logical answers. As Darwin stressed, evolution has no direction, nor does
it inevitably lead to higher or more complex life, although most evolutionists
have written and argued as if it causes only movement upward, from amoeba
to humans. Selection selects only for adaptation to local environments,
and in their view this adaptation is achieved only by cold cruel selection-some
die, others live. Its "goal" is survival only, and those who
are more likely to survive are better adapted, and thus are more likely
to pass on their traits to their better offspring (Gould, 1989).
Natural selection would not
evolve upward, for example, bacteria into humans, but at best would evolve
simple bacteria into better adapted bacteria, or flies into better adapted
flies. The fossil record shows no evidence of anything beyond this. No
clear example has ever been found of a lower clearly less adapted animal
in the fossil record which can be shown to be evolutionarily related to
similar, more advanced type of an animal living today. There exist hypothetical
cases and examples of differences for which reasons for assumed changes
are speculated, but no example exists of an animal that lacks wings, and
evolves such step by step because these wings are clearly an advantage
for it in escaping predators. Not one wingless fly has ever been uncovered,
although millions of modern type flies preserved in amber have been uncovered.
The many examples we have, such as flies trapped in amber or animals preserved
in other ways, finds that, aside from the introduction of a few mutations
producing deevolution, there is virtually no difference between the fossils
and modern examples.
The easy-to-grasp and compelling
natural selection argument is used to help explain all biological data,
but it may actually explain very little. Human life consists of many activities
which are mentally pleasurable. Walking in forests, listening to music,
creating poems, doing scientific research, aesthetic enjoyment of nature,
and myriads of other activities are often not related in the least to
survival or adaptation in the Darwinian sense. Some writers have struggled
in vain to "explain" by natural selection the existence of creations
like music and art, all of which involve extremely complex body structures
to accomplish. Music in its many variations is loved the world over, and
yet certain music preferences have not been shown to increase reproduction
rates or to facilitate survival. Many, if not almost all of our most rewarding
activities and "peak experience producers" are not only unexplainable
by this theory, but contradict it.
References
Ayala, Francisco J. 1974.
Biological evolution: natural selection or random walk? American Scientist.
62:692-701.
Berg, Leo. 1969. Homogenesis.
MIT Press. Boston.
Benton, Michael J. 1983. No
consensus on Archaeopteryx. Nature 305:99-100.
Bergman, Jerry and George
Howe. 1990. 'Vestigial organs' are fully functional: a history and evaluation
of the vestigial organ origins concept. Creation Research Society Books.
Kansas City.
Bethell, Tom. 1976. Darwin's
mistake. Harper's. 252-70-75.
Borchgrave, Arnold (Editor).
1988. Slime hasn't changed in 2 billion years. Insight. 4(4):18.
Brady, Ronald H. 1982. Dogma
and doubt. Biological Journal of Linnean Society. 17:79-96.
Colinvaux, Paul. 1978 Why
big fierce animals are rare: a ecologist's perspective. Princeton University
Press. Princeton.
Darwin, Charles. 1962. The
origin of species. The Modern Library New York.
Darwin, Charles.. 1958. The
autobiography of Charles Darwin. (Nora Barlow, editor). W. W. Norton.
New York.
Day, David. 1989. Vanished
species. Gallery Books. New York.
Deevey, Edward S., Jr. 1967.
!le reply: letter from Birnam Wood. Yale Review. 61:631-640.
DeGarmo, Scott (Editor). 1982.
An earth bacterium. Science Digest. 90(4):19.
Duncan, Thomas and Tod F.
Stuessy. 1984. Cladistics: perspectives on the reconstruction of evolutionary
history. Columbia University Press. New York.
Eiseley, Loren. 1958. Darwin's
century: evolution and the men who discovered it. Doubleday Anchor Books.
Garden City, NY.
Farb, Peter. 1962. Insects.
Time Life Books. New York.
Gaffney, B. and E. P. Cunningham.
1988. Estimation of genetic trend in racing performance of thoughbred
horses. Nature. 332:722-723.
Gale, Barry G. 1982. Evolution
without evidence. University of New Mexico Press. Albuquerque.
Gause, G. F. 1969. The struggle
for existence. Hafner. New York.
Gliedman, John. 1982. Mutations.
Science Digest. 90(2):90-96.
Goldschmidt, Richard. 1942.
The material basis of evolution. Yale University Press. New Haven, CT.
Goldschmidt, Richard. . 1952.
Evolution as viewed by one geneticist. American Scientist. 40:84-98.
Gould, Stephen. 1977. Ever
since Darwin. W. W. Norton. NewYork.
Gould, Stephen. 1980. This
view of fife. Natural History. 89(l):12-16.
Gould, Stephen. 1981. The
mismeasure of man. W. W. Norton. New York.
Gould, Stephen. 1989. Wonderful
life; The Burgess Shale and the nature of history. W. W. Norton. New York.
Grasse, Pierre. 1977. Evolution
of living organisms. Academic Press. New York.
Hill, William G. 1988. Selective
breeding; why aren't horses faster? Nature 332:678.
Hitching, Francis. 1982. The
neck of the giraffe. Tichnor and Fields. New Haven.
Johnson, Clifford. 1976. Introduction
to natural selection. University Park Press. Baltimore.
Johnson, Phillip E. 1990.
Evolution as dogma: the establishment of naturalism. First Things. 6:22.
Johnson, Phillip E. 1991.
Darwin on trial. Regnery Gateway Press. New York.
Leigh, Egbert Giles. 1971.
Adaptation and diversity: natural history and the mathematics of evolution.
Freeman, Cooper. San Francisco.
Lester, Lane and Raymond G.
Bohlin. 1984. The natural limits to biological change. Zondervan. Grand
Rapids.
Macbeth, Norman. 1971. Darwin
retried; an appeal to reason. Gambit. Boston.
Maddox, John. 1991. Is Darwinism
a thermodynamic necessity? Nature. 350:653.
Masckenzie, John P. S. 1977.
Birds in peril: a guide to the endangered birds of the United States and
Canada. Pagurian Press. Toronto.
Mayer, Ernst. 1964. Systematics
and the origin of species. Dover. New York.
Miller, Jonathan and Borin
Van Loon. 1982. Darwin for beginners. Pantheon. New York.
Ortner, Donald J. (Editor).
1983. How humans adapt: a biocultural odyssey. Smithsonian Institution.
Washington.
Pendell, Elmer. 1977. Why
civilizations self-destruct. Howard Allen. Cape Canaveral, FL.
Prince, J. H. 1980. How animals
hunt. Elsevier/Nelson. New York.
Reid, Robert G. B. 1985. Evolutionary
theory: the unfinished synthesis. Cornell University Press. Ithaca.
Rensch, Bernhard. 1959. Evolution
above the species level. Columbia University Press. New York.
Ruse, Michael. 1982. Darwinism
defended; a guide to the evolution controversies. Addison-Wesley. Reading,
MA.
Russell, Claire, and W. M.
S. Russell. 1968. Violence, monkeys, and man. Macmillan. New York.
Schopf, J. W., E. S. Banghon,
M. D. Maser, R. 0. Gordon. 1965. Early bacteria. Science. 149:1365-1366.
Simpson, George Gaylord. 1967.
The major features of evolution. Columbia University Press. New York.
Solbrig, Otto T. 1966. Evolution
and systematics. Macmillan. New York.
Tinkle, William J. 1976. Selection:
artificial and natural. Creation Research Society Quarterly 13:131-133.
Tributsch, Helmut. 1984. How
life learned to live: adaption in nature. MIT Press. Cambridge.
Williams, George C. 1966.
Adaptation and natural selection. Princeton University Press. Princeton.
Williams, Leonard. 1977. Challenge
to survival: a philosophy of evolution. Harper and Row. New York.
Wilson, Edward 0. 1975. Sociobiology;
the new synthesis. Belknap Press of Harvard University Press. Cambridge.
Zahl, Paul A. 1978. In an
amber mood. The American Scholar. 47:237-244.

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