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The Darwin
controversy frequently breaks down into a debate over continuous or
discontinuous evolution. Proponents of discontinuous evolution tend to be their
own worst enemies, and we will tend to avoid the terms
‘continuous/discontinuous’ except as façon 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 prove anything about the claims for natural
selection.[i]
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. 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 or 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.
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 question about the basic Darwinian claims. Something very sudden
occurred in the emergence of man, or so it seems from the evidence. The descent
of man is beset with the issue of continuity/discontinuity dead center in its
dataset.
Consider again the
analogy 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.
Mystery Force X Part of the problem
with Darwinian theory is that we are unable to detect the real ‘force’ of
evolution, all we see being the processes of natural selection. Science gives us
the fundamental forces, then demands that everything be reduced to this. This
may the source of the problem, for ‘natural selection’ is taken as the ‘force
that isn’t a force’ that does evolution, a role it cannot play. This unknown
factor requires a new scale of observational detail. As we move to examine
history, with its relatively rich dataset, we should be on the look-out for this
‘mystery force’. The term ‘force’ might turn out to be the wrong one, but by a
principle of sufficient reason a ‘something that does evolution’ is what we are
after.
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 (in some ambiguity between ‘machine’ and ‘engine’, perhaps).
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. Various candidates from population genetics are
sometimes metaphorically pressed into service here, but the void remains.
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, in a principle of sufficient reason, to a
force argument, and here natural selection seems instead to be the analogue to Newton’s First Law. The dynamic factor is
entirely absent. 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’! 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 the 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, that is, it has not actually observed in full ‘how evolution
happens’. And this itself might require a
theory, e.g. that ‘evolution’ shows a macro pattern. 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.
[i]
Stephen J. Gould, The Structure of Evolutionary Theory, (Cambridge:
Harvard
University Press, 2002).
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