|
The discovery of
evolution was one of the greatest turning points in the development of human
thought. It changed man’s perspective on himself as profoundly as any other
breakthrough in the development of science. First appearing in early Greek and
Indian thought during the Axial Age, the idea resurfaced powerfully during the
Enlightenment. Then Darwin’s seminal publication of his Origin of Species
in 1859 more than anything else precipitated this revolution in thought.
And
yet a tremendous controversy, one long argument, has from the beginning
accompanied Darwin’s achievement. This has produced the intractable and almost
endless Darwin debate, which has become a central feature of modern culture
itself. In part, this is the result of the renewed outbreak of the conflict of
science and religion. The appearance of Darwin’s theory of evolution became a
defining moment in the emergence of secularism, and resulted in the twentieth
century opposition of fundamentalist religious groups whose challenges to Darwin
have grown into a series of skirmishes in a cultural war.
But
the debate was always much broader than the religion-science divide, or even the
question of evolution itself. It was the theory of natural selection, hence of
random evolution, that Darwin brought to his data that caused many even of those
who embraced the factual discovery of evolution to challenge Darwin’s claims.
And this has produced the many, often confused, discussions distinguishing the
‘fact’ and the ‘theory’ of evolution. The fact of evolution is really
the discovery of ‘deep time’, the endless vistas of planetary eons
stretching from the dawn of life. The crystallization of the fossil record in
this progression of geological ages reached an evidentiary threshold that made
the idea of development in time an inevitable conclusion. To project onto this
almost stupendous temporal field a theory of how life evolved was an audacious
step destined to oversimplifications.
It
was on the basis of this theory that the claims for a totality of scientific
knowledge came to seem plausible. The theory of natural selection purported to
resolve all the key metaphysical issues that block the way to a comprehensive
scientific worldview. And yet here Darwin was open to challenge from the
beginning, because of the failure to properly document the claims for his theory
of natural selection. In some ways Darwin made it easy for his critics, because
he attempted an overarching generalization that was simplistic and ideological
rather than truly scientific. With hindsight, we can see that the true nature of
a science of evolution is not easy to resolve. The problem lies in truly
observing evolution. It is relatively easy to conclude that evolution has
occurred. But there are degrees of
observation. It is very difficult to track an evolutionary sequence over time in
order to get a sense of its real dynamics.
A
Glimpse of evolution The
problem with the theory of Darwin lies in the verification of its claims for
natural selection, and random evolution. Properly documented sequences of
evolution are rare to non-existent. The only intensively observed
historical/evolutionary sequence, one with data at the level of centuries or
less, is that of world history since the invention of writing. This unique data
set, five thousand years in length, is just barely long enough to put the idea
of natural selection to a test. The result suggests something entirely different
from the mechanism claimed by Darwin. History itself, seen rightly, will give us
a glimpse of evolution in the form of high-speed bursts or organized
evolutionary transformation. The most notable aspect of this data is the
so-called Axial Age phenomenon, an historically visible transformation far more
complex than anything proposed by Darwinism.
The relationship of
history and evolution must remain a subtle one, but the fact remains that no
final definition of what we mean by ‘evolution’ has proven satisfactory. The
reductionist attempt to define ‘evolution’ in purely genetic terms does not
solve the mystery.
The
standard narrative of the Darwin debate writes the opposition to Darwin in terms
of the conflict of spiritual versus material explanation. Those terms confuse
the discussion. The reality is more complex. Scientists defend methodological
naturalism as the basis for research. We need not quarrel with this save to
suggest that this rubric is not fully defined in advance. And the question of
nature is not so simple. Between Descartes, Spinoza, and Kant the standard
scientific definitions of naturalism tend to contract into a post-philosophical
physicalism that presumes to be post-metaphysical. But this has never
successfully resolved the issues of human consciousness or man’s social
history. The alternative is not to posit some spiritual antithesis to the
natural domain but to account for the totality of what constitutes man.
The
issue is compounded by the attempts to define secularism. Religious
anti-modernism tends to be armed with a critique of the limits of scientism
taken as a reaction to the Enlightenment. But the best critique of the
Enlightenment lies in the Enlightenment itself, in its full scope. The rise of
modernity is more than the Scientific Revolution. The emergence of modern
freedom is an independent historical process emerging in parallel to the
Scientific Revolution. There is an irony here in that the emergence of freedom
is itself an evolutionary process, and its relation to the emergence of
modernity shows the crux of this process very close to home. But this requires
that we have the means to carefully distinguish what we mean by ‘evolution’
from free agency.
Secularism
and freedom The prominence of
fundamentalist religion in the Darwin debate makes us forget that the basis of
modernity itself is more than the reductionist fundamentalism it has become in a
positivistic age. The Protestant Reformation was itself the first stage of
modernity. The very basis of the idea of freedom, at the core of all modern
liberalisms, has a metaphysical character that would in principle be excluded by
scientific explanation. These classic issues of the philosophy of history arose
at dawn of modern biology but were filtered out in the tide of later Darwinian
triumphs. The ambiguous 'transcendentalism' of the idea of freedom, as explored
by a philosopher such as Kant, becomes a key foundation stone for secularism
itself.
Thus a disguised reverse
metaphysics haunts Darwinism: it must derive the nexus of freedom issues from
its selectionist assumptions. We need look no further for the difficulties of
universal biology. Related to this is the question of teleology, and/or
evolutionary progress. Divorcing modern thought from the idea of progress,
whatever its ideological liabilities, because of the presumed demonstration of
random evolution by Darwin, has sown confusion in historiography and biology
both. And now the current phase of the debate sees the so-called Intelligent
Design movement at work attempting to revive the natural theology of William
Paley. But the design argument, challenged by such figures as Kant and Hume, is
as problematical as that for natural selection. The design argument is often a
confused version of the issue of teleology.
Natural
teleology The methodological
naturalism of modern science, and of Darwin's theory, began with the challenge
to Aristotle at the beginning of modern physics. But the questions of biology
are not easily resolved in this fashion. These issues were unwittingly exposed
by the philosopher Kant whose proposals to examine natural teleology extend our
definition of naturalism. This, however, requires a careful 'critique' of
metaphysics, and there is no easy resolution of teleological questions.
Paley's natural theology
is the original context in which Darwin produced his theory, against which he
reacted, claiming that he had superceded the claims for design in nature. And
yet this tradition had already been powerfully challenged prior even to its
nineteenth century reemergence. This was also in part an institutional question
in the context of the English Anglican church, and many of the early students of
biology were ordained in the establishment ministry of the Church. This
situation made dissenting or secular views a risky endeavor. The triumph of
Darwin’s theory signaled more than a scientific breakthrough, it also crested
on the tide of the professionalization of science and the formation of a new
establishment not bound by the clerical tradition. Indeed, Darwin’s great
champion, T. H. Huxley, is clearly seen as one of the first generation of this
new cadre of scientists, and his efforts were decisive in the changing of the
guard. A considerable irony is that Huxley was open to the criticisms of
Darwin’s theory and even prodded Darwin on the inadequacies of his claims for
natural selection, this on the eve of publication. But this period was already
showing the severe contraction of the Enlightenment debate over the place of
science in the context of metaphysics.
The
chronic intractability of the Darwin debate springs finally from the concealed
metaphysical character of Darwin's theory as the claims for natural selection
became the master key to unlock the enigmas of divinity, soul, and free will.
Like overshoot and undershoot the metaphysical dialectic on these questions is
never satisfied by simple negations. The result is that the exact definition of
even so basic a category as that of an organism is left unresolved by Darwin,
who produced the imaginary solutions based on adaptationism to all these
questions characteristic of positivistic reductionism. It is not surprising that
this 'instant metaphysics in reverse' produces an oversimplification of human
nature and never resolves the origin of consciousness. His work was a triumph of
public acclaim, in the tide of a bestseller. The failure to properly document
his claims indicates a series of misunderstandings about what a theory of
evolution should be. We have never really observed evolution at close range, a
very difficult thing to do, and the need for a sounder empirical starting point
is preempted by the scale of deep time, and the relative emptiness of the fossil
record. One irony is that while the discovery of deep time immensely broadened
the scope of our knowledge of the universe, it is history itself that can give
us the clue to the riddle of human evolution. And yet, the question of
science applied to history has no simple solution. What is a science of history?
It is interesting that we should presume to have a science of evolution, given
the difficulties that attend the development of a science of history. Why should
the one be considered a fait accompli, while the other is considered a
hope for the future?
|
|