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On Charles Darwin |
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The Darwinian Thesis In 1859 Charles Darwin published his pivotal work On the Origin of the Species. Humanism had finally found an axis for a world wide revolution. The search for a naturalistic explanation for the existence of the universe was one of the great quests of humanism in the eighteenth and nineteenth centuries and the Age of Reason promised that science would deliver such a new world view. Charles Darwin was the supremely adapted instrument for such a task; exacting scientist, theologically restrained, and personally reserved. The concepts he articulated were likewise modest and when T.H. Huxley, Darwin's bulldog, first read the Origin he is reported to have said, "How extremely stupid not to have thought of that" (Origin, p. xv). The simplest form of the central claims of Darwin's theory may be arranged as a syllogistic argument which he himself provided. The argument was as follows: (1) since there have been long ages, (2) since organic beings vary, (3) since organic beings increase by geometrical powers, then: " I think it would be a most extraordinary fact if no variation ever had occurred useful to each being's own welfare, in the same way as so many variations have occurred useful to man" (Origin, p. 126). These premises and the conclusion have been summarized in the naturalistic theory of origins called "descent with modification through natural selection" (Origin, p. 343). We will now consider the basic premises and the conclusion in order.
Uniformitarianism One of the crucial foundations for the Darwinian revolution was the
principle of uniformitarianism. This principle was first advanced by James Hutton who
argued that the geological structures of the earth could be explained by the work of long
ages of time. Charles Lyell later became the most effective advocate for abandonment of
the Biblical view of earth's origin, which he called the "Mosaic system" of
geology, in favor of the view that all the features of the Earth's surface were produced
by natural forces operating for long ages. His arguments that the Earth's crust was the
product of thousands of millions of years of activity convinced many that there was no
need for explanations motivated by the Biblical record of the Genesis Flood or subsequent
natural catastrophes. His principle of uniformitarianism can be stated as follows: The
causes which shape the Earth's surface in the present are the only ones that have operated
in the past and they have always acted at the same rate, or "the present is the key
to the past." Lyell's influence in geology later brought about a nearly complete
abandonment of what was then called "catastrophism" and also laid the
foundations for evolutionary biology.
Biological Variation The backdrop for Darwin's principle of biological variation was the common
notion of the "immutability of the species." The crucial philosophical
components of this idea had originated with Plato and Aristotle. According to Plato there
were a "limited number of fixed, unchangeable 'ideas' underlying the observed
variability, with the eidos (ideas) being the only thing that is fixed and
real" (Origin, p. xix). According to Aristotle all of nature could be arranged
in a "continuous series in which each link would be almost indistinguishable ... from
the lowest organisms to the highest" (Durant, pp. 65-66). This scale of nature, or Scala
Naturae, was the precursor of what would later be know as the "Great Chain of
Being." This quasi-theological theory was based on Aristotle's Scala Naturae
with the addition of angels and God attached at the top, owing to the influence of deism
and Christianity in the west during this period. This construct should be understood as a
syncretic amalgam of Greek philosophy and Christian doctrine possessing profound internal
inconsistencies, since the Biblical conception of God is one of transcendence; and
therefore, he is completely distinct from his creation. One of the logical deductions of
this view was the "immutability of the species." We must, however, distinguish
between the Biblical idea of "created kinds," or categories in which each
original creation could reproduce "according to its kind" (Genesis 1:12), and
the theory of immutable species.
Malthusian Population Dynamics The next major concept described by Darwin was referred to as the "struggle for existence." This idea was important since Darwin believed that it allowed Nature to replace intelligence in the selection process so that speciation would continue without guidance. Herein, lies the central theme of Darwin's thesis:
Ultimately, Darwin argued that if the intelligent selection of man in
producing variations in species can be replaced by the a process of natural selection,
then why not replace the "apparent design" of life itself with that same process
in Nature. It is important to observe how Darwin has metaphorically personified Nature as
the predominant "Power" and source of nature itself.
Summary Conclusion With the assumption of an enormous lapse of time, the evidence for limited biological variation, and the acceptance of the struggle for existence, Darwin concluded that variation could continue on indefinitely and ultimately account for the origin all life on earth--including man.
Analysis The common view of the history of Christian motivation of the sciences is
clearly checkered. Though no one should doubt the importance of the motivating force of
the Biblical idea of a Creator/Lawgiver God who created man in his own image so that
"man can think the thoughts of God after him," it is also clear that the
conflict between the church and humanism has never ceased. The struggle between the
Catholic church and Galileo largely intensified the antagonism between Christianity and
naturalistic humanism. Then, with the triumph of the Darwinian revolution in the sciences,
humanism was seen as ultimately vindicated. Since man was not qualitatively distinct from
God on the Great Chain of Being, God could be replaced by man on the pinnacle of progress.
Thus, did the Age of Reason bring in a new era. But what about the scientific claims of evolution as an explanation for the origin of life? Were they truly based on a solid empirical foundation? In what follows I will attempt to show that humanistic theories of origins are based upon the concept of naturalism and that as Thomas Kuhn argued in The Structure of Scientific Revolutions, "a decision of that kind can only be made on faith" (Kuhn, p. 158). The first important principle that must be established is a definition of what constitutes true science. Although Kuhn had no concern for precise definitions (Kuhn, p. 160), there is reason for concern about defining science merely by symptoms rather than by an objective standard for demarcation. The method used by all successful scientists throughout history is now called the "Baconian scientific method." That method is given as follows:
The Baconian Scientific Method: (Applies to naturally recurring processes in the present.)
The first thing to observe is that, while Darwin did use this method "whenever
possible" (Origin, p. x), by definition he could not observe events or process
in the past and therefore he chose to rely upon an "alternative"
inference by analogy in the present. In point of fact, Darwin relied heavily on
analogies between processes in the present for extrapolation into the past. Darwin was
aware that this was a doubtful practice and admitted that "analogy may be a deceitful
guide", but pushing ahead he wrote, "Nevertheless, ... I should infer from
analogy that probably all the organic beings which have ever lived on this earth have
descended from some one primordial form, into which life was first breathed" (Origin,
p. 484). The important distinction to be made between the Baconian scientific method
of inquiry and this "alternative" is that in confirmation we are able to observe
the actual processes themselves; however, when we take observations in the present to
infer that processes or events may have occurred in the past we must recognize that this
is mere speculation and not logically guaranteed or necessarily reasonable.
Darwin and the Fossil Record Scientific theories are judged by their predictive power. One of the central predictions of evolution is that descent with modification in organisms occurs in the finely graded variations. This should have been observed at some point in the contemporary world, but for obvious reasons Darwin spent a great deal of time explaining why he believed that intermediates became extinct through competition for domination of a biological niche. Whether it is valid to argue that no family line could simultaneously survive at any place in the entire natural world is questionable; however, Darwin felt compelled to argue most strenuously in explanation of the lack of fossil evidence for intermediates. As he stated in his summary chapter:
Though it was clearly the intent of Darwin to explain away the lack of evidence for his theory we should not feel obliged to accept a "scientific" theory which lacks empirical evidence. First it must be observed that the number of transitional forms at some time in evolutionary history would have to be, in practical terms, infinite. Darwins's hypothetical "finely graded variations" must have lived at some point in Earth history and no matter how unfavorably he envisioned the probability of fossilization it is inconceivable that no intermediate fossils could be found. Yet, once again in Darwin's day the knowledge of the fossil record was comparatively small. Today that claim can no longer be maintained. In Luther Sunderland's important book, Darwin's Enigma, he explains the present state of knowledge of the fossil record:
On behalf of the New York State Board of Regents, Luther Sunderland interviewed the top paleontology experts at five of the world's greatest fossil museums. The results are as follows:
In the words of Dr. Collin Patterson, Senior Principle Scientific Officer of the Paleontology Department of the British Museum of Natural History, London:
It appears that we should take at least some of Darwin's words to heart:
"He who rejects these views on the nature of the geological record, will rightly
reject my whole theory."
Darwin's Prophetic Vision for the Future In Darwin's summary chapter he makes a number of what he might have considered to be scientific predictions, but which he finally called "a prophetic glance into the futurity" (Origin, p. 489). Some of those failed prophecies are as follows: There will be an end of the disputes concerning the definition of species (Origin, p. 484). In this case we need only consider the current debate between Cladists who favor the principle of typology, as opposed to Neo-Darwinists who favor the principle of phylogeny.
Finally, in a very uncharacteristic fashion, Darwin removed his theological restraint and made one last bold assertion and prophecy which reveals how potent ideas on origins may be. Compare and contrast the following: We may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world. Hence we may look with some confidence to a secure future of equally inappreciable length. And as natural selection works solely by and for the good of each being, all corporeal and mental endowments will tend to progress towards perfection (Origin, p. 489). First of all, you must understand that in the last days scoffers will come, scoffing and following their own evil desires. They will say, "Where is this `coming' he promised? Ever since our fathers died, everything goes on as it has since the beginning of creation." But they deliberately forget that long ago by God's word the heavens existed and the earth was formed out of water and by water. By these waters also the world of that time was deluged and destroyed. By the same word the present heavens and earth are reserved for fire, being kept for the day of judgment and destruction of ungodly men (2 Peter 3:3-7). With uniformitarianism and evolutionism as the poles, the Darwinian revolution has set the world into a motion which will ultimately be perfected in the fire.
Tim Nordgren, 8-2-96
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