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Proponents
of discontinuous evolution tend to be their own worst enemies, and we will tend
to avoid the terms ‘continuous/discontinuous’ except as facon de parler.
The action of a feedback device is discontinuous, but not grounds for
supernatural explanation. The foundation for all claims about evolution lies in
the fossil record. But the question of the fossil record is not so simple. One
of the most persistent criticisms of Darwin has always been that of the
so-called gaps in this record. There can be no doubt that the record is
incomplete, and that something suspicious lurks in the data Darwinists give for
the theory of natural selection. Over and over we see the phenomenon of rapid
emergence followed by relative stasis. The record of human evolution itself is
ambiguous here. The fossil record isn't really homogenous, in the sense that
random evolution should not show sudden changes in direction. Nonetheless
considerable progress has been made here by paleontologists. And many of these
supposed gaps have been filled, or, if not filled, given some inkling of a
transitional something (e.g. dinosaurs with feathers, or the basilosaurus), so
at least to a some degree the record is filling out, although this does not
add one jot to the claims for natural selection.
Here
critics of Darwin have too often fallen into confusion themselves, because the
whole idea of a 'gap' in the record suffers from misdefinition, if not
incoherence. Fatal theological temptations induce hallucination here in many
otherwise sincere minds aware of the problems of the fossil accounts. Although
it is certainly true that the fossil record is very sparse, too sparse to
maintain Darwinian certainties, it is not likely that one will find 'gaps' in
the record. Some form of macromutation (i.e. a sudden change in developmental
genes), for example, might well produce what looks like a gap. What is a gap? It
is highly likely that there is a continuous sequence of organisms showing an
unbroken lineage of bodily forms. That is not the same as saying that natural
selection alone is at work. However, we have no conclusive grounds to extend
this claim to the factor of consciousness, especially in the human case. A
sudden change of consciousness, or its transformation as
‘self-consciousness’, can, as we see from the Axial Age, change the
direction of history. But these critics have a point, and a refinement of the
'gaps' argument is easy to provide, hence the challenge to Darwin's theory
remains in some form. Taken over all, without claiming gaps in the record, we
should suspect that something is speeding up the process of evolution beyond the
rate entailed by natural selection.
Indeed,
conventional Darwinians such as S. J. Gould upgraded this argument with the
various claims for so-called 'punctuated equilibrium', which amounts to seeing
that emergence is often very sudden, followed by a period of stasis where the
rate of change is small, or nonexistent. Granting that such data is hard to
interpret, the basic issue simply won't go away. These theories suffered from
the inability to disassociate themselves from the fallacies of natural
selection, as they attempted to have their cake and eat it too, by proposing
various 'levels of selection'. But real evolution is altogether likely to be
something different. And it might well 'punctuate', this being followed by some
sort of 'equilibrium'. The issue is bound up in distinctions of
microevolution and so-called macroevolution, or speciation. The existence of
microevolutionary processes is not in doubt, but the elusive factor of
macroevolution remains unclear.
Those
who propose this issue of 'gaps' in the record, then, are onto something, but
need to consider that the fossil record is always going to be continuous in some
sense. This does not preempt the possibility, not of 'gaps', but of some other
evolutionary process that creates a real discontinuity in some definable sense on
top of that continuity. Think in terms of acceleration, as artificial as
physics logic might be applied to evolution. Acceleration is not a 'gaps'
argument, and its discontinuous action is not in contradiction with continuous
motion. To propose discontinuity as antithetical to continuity is logical
in the abstract, but in this case leads to the hopeless quagmire of miraculous
interventions of one kind of another in the creationist vein. We cannot say in
advance what that kind of process it would be that generates this sense of
discontinuity, but its existence is something that we must suspect based on the
evidence that we have. The discovery of complex genetic components such as
the developmental genes suggests one way of resolving the seeming paradox. But
that is not enough. Consider the Axial Age again.
Gap
argument in history As we move to study world history in light of the eonic
effect, we will discover how tricky the question of 'gaps' really is.
Considering the sudden compression or close packing of innovations in the
Axial Age, in a finite interval, we have something that shows, not a gap, but
historical continuity at all points, yet also shows a sudden speed up of
development, and on a level that has no connection that we know of to genetics. This
could be defined as 'discontinuity' but hardly a gap. That should leave us wary
of pronouncements about deep time. Only close observation at the level of
centuries suffices to discover what is going on. It is better to bypass the
confused language of discontinuity and gaps, and think in terms of transitions.
Remarkably,
the perfect example of the discontinuity factor, and its elusive basis, lies in
the attempt to resolve the mystery of the descent of man. There the (not
very adequate) evidence of the so-called Great Explosion stands out as a mockery
of the basic Darwinian claims. Something very sudden occurred in the emergence
of man, or so it seems from the evidence. We should be wary here of inadequate
evidence, and simply note that we are under no evidentiary obligation to accept
Darwinian claims at the current level of demonstration. However, this example
typifies the confusion Darwin critics often succumb to, because the evidence of
some sudden crossing of a threshold for species man is not the same as man's
speciation as such, nor is it incompatible with earlier continuous processes
that may also have been crucial. Once again the question of two levels suggests
its relevance. But, in any event, the descent of man is beset with the issue of
continuity/discontinuity dead center in its data set. So much for Darwinian
certainties here. They are based on a monopoly of public communication to drown
out critics, and little more. The evidence for this Great Explosion, as a sudden
transition, poor as it is, is at least on a par with Darwinian presumptions in
advance they have explained it all via the nearly metaphysical projection
backwards of selectionist theory. So the evolution of man shows the prime
difficulty latent in all theories of the Darwinian type, if they can be called
theories at all. The point is that Darwinists merely assert they have solved the
issue of man's descent, when they most definitely have not.
We
might consider again the example of acceleration, and beyond that the definition
of science in the case of biology. On the one hand, biologists wish to make
evolutionary theory compatible with physics, and yet to do so they must fail to
do what physicists do: build a science around a type of 'force'. This question
was very clear in the eighteenth century, but the result was the emergence of
vitalism, which was not up to the job of explanation. It is this search for the
missing process that Darwinists find unacceptable, because there are no
candidates for this in the thinking of reductionist science. It is
nonetheless worth considering the force analogue, and then matching that to,
say, the Axial Age phenomenon. Clearly natural selection operates through
history, but the Axial period shows there is a ‘something like a force’ that
suddenly drives the historical process in a new direction.
There
is something peculiar about this limitation in the Darwin scheme, in the sense
that any science is going to have a 'force' argument, this force is going to
show itself in terms of its own action, archetypically 'acceleration', and this
action will seemingly be short acting. Such language is heuristic and must be
set aside as at best metaphor once we have real data to examine, but the point
is that Darwinists constantly remind us of the right way to do science, even as
they propose a science with no substance to it. This example of the missing
'force' uses the language of physics, but the basic issue must remain. Of
course, we have already criticized the physicalism that created reductionist
thinking, and there is no reason why biological evolution should conform to a
force argument. But there is likely to be an analogue to a force argument in the
sense of some intangible ‘principle of sufficient reason’. That is, any
phenomenon is going to have an explanation of some kind. This is the oddity of
Darwinism. The surrogate substitute of natural selection for a true
‘explanation’ of what drives evolution leaves it with a strange void at its
core. The point is that Darwinism is quite anomalous as a 'science' in the sense
that this process that actually 'does evolution' is missing, and the strong
suspicion is always there that natural selection, however real in the survival
struggles of organisms, is simply the microevolution we see in the absence of
'real evolution'. Darwinists become adamant here, or change the subject, but the
sword of Damocles has always stood over Darwin's claims for this reason. It is
like confusing Newton's first and second laws. We begin to suspect that the
regime of natural selection too often perpetuates continuity, and is really the
opposite of 'evolution'!
Instead
of thinking in terms of gaps we can simply compare large time intervals. The
course of purely random evolution requires by statistical calculation an immense
vista of time for its action. The ratio of that interval length to that of the
actual history of life produces an inference that evolution proceeds much more
rapidly than Darwin's theory would allow. Thus we can infer that something is
missing in standard accounts by simple probability arguments. In a now classic
text, Evolution From Space, Hoyle and Wickramasinghe give one version of
this objection.
Darwinian evolution is most unlikely to
get even one polypeptide right, let alone the thousands on which living cells
depend for their survival. This situation is well known to geneticists and yet
nobody seems prepared to blow the whistle on the theory. [Hoyle &
Wickrmasinghe, Evolution From Space
(London: Dent, 1981), p. 148]
This
passage has been the object of endless ‘refutations’ but we forget that
genetic research has essentially confirmed it with the discovery of new
developmental structures and processes, as the level of DNA, if not large-scale
evolution. And it is hard to see how random mutations in complex developmental
sequences is going to work as a Darwinized evo-devo. The issue is not gaps but
the compression inferred by the time-periods in question. As the geneticist
Theodosius Dobzhansky remarked, "Nothing in biology makes sense except in
the light of evolution." There is a corollary to this,
"Evolution makes little sense in the light of natural selection."
Theories of Evidence The
Darwin debate constantly scrambles the issues of the 'fact' of evolution and the
'theory'. There is a complication here, which is that we can distinguish a
'theory of the evidence' from a 'theory to explain that evidence', should that
theory of the evidence graduate to stable data. Darwinism has yet to produce a
proper theory of the evidence. This subtle difference constantly confuses all
discussion. In economics, for example, a theory of evidence would be, as a
theory, that economies show cyclical behavior. A second theory to explain the
first, i.e. explaining cyclical behavior, is quite another task. Note that
without a detailed record we would be likely to think in the abstract about
economic systems. This example shows the dilemma of Darwinian theory. We have no
detailed record of the way evolution actually happened, and tend to deal only in
abstractions based on Malthusian or other misleading examples. This is clearly
the trap into which Darwin and Wallace fell, because they were struck by the
teeming behavior of jungle populations with its clear profusion of speciation
processes. They thought the full evolution of forms was explained by its surface
aspect, the competitive struggle in biogeographical regions.
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