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A
Critique of the Evolution
Theory
From Gauòéya-Vaiñëavism
By Rabin Bangoer
1.
Introduction
Evolutionists
and religionists generally do not like each other. In my practice of
Gauòéya-Vaiñëavism and with
my background as a scientist, I have
experienced prejudice, misconceptions, and ridicule from both sides.
Religionists condemn the atheistic nature of the evolution theory.
Evolutionists find the idea that God created life primitive and naive,
or they cannot get a hold on it. This situation is not conducive for a
dialogue.
By writing
this essay I wished to get a better understanding of the evolution
theory and what the
Gauòéya-Vaiñëava view on this
theory is. I wanted
to find out whether there is any possibility of the two becoming more
united.
Gauòéya-Vaiñëavism
is a devotional, theistic tradition based on the holy (Vedic)
scriptures of India. It teaches that God is ultimately a person and
that the goal of life is to reestablish our loving relationship with
Him.
The glossary at the end of this
paper explains some technical terms and Sanskrit words.
The evolution
theory is a very complex system of mechanisms and views. To make it
more comprehensible I approach it from different points of view: how
did it develop; what kind of evidence is there; what are the problems?
The evolution
theory was founded by Charles Darwin (1809-1882). Barbour (1998, 52-53)
and McGrath (1999, 188-189) describe how he came to this theory. Some
elements of the theory had already been formulated by others: the
'struggle for survival' and the variations of species. (Barbour, 50).
Darwin got the idea of selection by studying the 'artificial selection'
of animal breeders. (McGrath, 157). He got the notion of 'struggle for
survival' from Malthus's population theory. (Barbour, 52).
During a
five-year journey around the world Darwin noticed that species living
on different islands showed anatomical variations and that favorable
variations enabled organisms to survive longer. Thus these variations
were better conserved than unfavorable ones. Darwin called this
principle 'natural selection.' He believed that he had found the
mechanism for the development of new species.
In 1859
Darwin published On the Origin of Species, after having collected a
huge amount of experimental data for twenty-seven years. In 1871 he
published The Descent of Man, which described the evolution of humans.
According to
Darwin's evolution theory, species undergo 'random variations' and
natural selection. Some variations equip organisms to better face the
environment or compete with other populations (the 'struggle for
survival'). Better-adapted organisms have more chances to survive and
reproduce, and weaker ones die out ('survival of the fittest'). Over a
long period this causes species to change.
In the
twentieth century many new theories emerged: population theory,
information theory, and system theory. (Barbour, 221). The discovery of
DNA gave rise to molecular biology, which includes genetics and
heredity. These new developments impacted the evolution theory. The
elimination of God from science made the evolution theory atheistic.
The result of all these modifications is known as 'Neo-Darwinism' or
'the Modern Synthesis.' (Barbour, 222).
Barbour
(221-223) describes characteristics of the Modern Synthesis. Variation
of species is now considered to be caused by genetic mutations (for
example, by X-rays or chemicals) and recombination. According to
population theory, a species is united by its reproductive habits, not
by morphological similarity; there can be much variation within a
species. The principle of natural selection has been expanded with
additional mechanisms:
(i) 'symbiosis' - cooperation
between species;
(ii) 'differential reproduction' -
the dominance of a mutated gene depends on how many descendants the
organism produces;
(iii) 'division of labor' -
organisms in a population carry out their own specific tasks (like in a
termite population);
(iv) 'selective behavior of
organisms' - for example, birds looking under the bark of trees;
(v) 'internal
behaviour with purpose' - random mutations are not always the cause of
change, but they carry the initiatives of the organism (like instinct,
learning, or curiosity).
According to Barbour (223-225) there
are also discussions to expand the Modern
Synthesis:
(i) 'punctuated
equilibrium' - the development of new species
happens suddenly, in bursts, not gradually;
(ii)
'non-adaptive changes' - not every change is induced by external
selection or is useful, some changes are side effects of others;
(iii)
'genetic drift' - in small populations, random changes in gene
frequency can lead to the conservation or elimination of a property;
(iv) the
mechanism of selection operates at different levels: individual
organisms, 'kinship groups' (groups with shared genes and social,
interdependent behavior),
or whole species (a species behaves
like a organism but on a larger time scale);
(v) 'active
role of the genes' - genes do not always passively undergo mutations,
they can also change by 'transposition' (rearrangement on the DNA
string), or by interaction with enzymes that react to signals from the
environment (like in the immune system).
Developments
in information theory and systems theory explain that there can be both
chance and direction in evolution when it includes the following
elements (Barbour, 227-230):
(i) a hierarchy of levels - nature
consists of atoms, molecules, genes, cells, organs, organisms,
populations, and species;
(ii)
information exchange between and within the levels - DNA and the
surrounding cytoplasm exchange information through proteins;
(iii)
restrictions on the information exchange between different levels - the
cytoplasm puts restrictions on the possibilities of DNA mutations;
(iv) chance - random mutations of
DNA.
The Encyclopedia Britannica (Hoiberg
et al. 2002, evolution theory) summarizes the evolution theory in three
concepts:
(i) 'common descent' - all organisms
have descended from a common source;
(ii) history and details of
'speciation' - when and how have new species developed;
(iii) mechanisms of speciation
According to
the Britannica, the concept of common descent has been 'accepted by
virtually every biologist.' The history, details, and mechanisms of
evolution are 'matters of active scientific investigation.'
The Britannica article gives
evidence from the following areas, for which the evolution theory
provides an adequate explanation.
(i) 'The fossil record'
Fossil
evidence has become 'considerably stronger and comprehensive' because
of developments in the twentieth century. When an organism dies parts,
of the body are conserved in the mud and become fossils. By radioactive
dating methods it is possible to estimate the age of the fossil. Figure 1
shows a diagram of the current fossil record. The Britannica also says
that some intermediate forms between species have been found. In
Darwin's time the lack of evidence of intermediate forms between
monkeys and humans was a big issue (the famous 'missing link'). In the
meantime, several missing links have been discovered: the
Australopithecus, the Homo Habilis, and the Homo Erectus. Figure 2
shows the evolution of the human brain size on the basis of human
fossils. After interpolating the data, it appears as though the
different human species are related and their brain has been constantly
growing.
(ii) 'Structural similarities'
Similarities
in the anatomies of different species indicate that they must be
related. For example, turtles, horses, humans, birds, and bats have a
very similar bone structure. Many species also have an imperfect
organic structure, or unnecessary limbs (like the forelimbs of
turtles). These must be remnants of the process of speciation.
(iii) 'Embryonic development'
The way
embryos of different species develop is very similar, especially during
the early phases. For example, human embryos develop gills and a tail
during some phase. This similarity lasts longer for more related
species. In later phases the embryos differentiate.
(iv) 'Biogeography'
Species in
different geographic areas show characteristics that are found only in
those areas. They must have evolved from ancestors that settled in the
area.
(v) 'Molecular biology'
Molecular
biology has shown that the DNA structures of all organisms, from
bacteria to humans, are very similar in composition and operation.
There is qualitative and quantitative proof. This is an indication of
common descent. Barbour (222) further mentions that it is possible to
estimate the date when a new variation of a species originated by
comparing the DNA. The result of this dating method is consistent with
the dating of fossils and with the history of the anatomy of species.
Another type of evidence is an experiment by Miller in 1953 (Barbour,
226). He mixed chemicals (heated water and some gases) and subjected
the mixture to sparks. Many amino acids (building blocks for DNA) were
formed. Amino acids were also detected in the organic material of
interstellar gas and in meteorites. In all three cases Glycine and
Alanine were the two main amino acids. This gives rise to the
hypothesis that maybe life originated from a 'cosmic soup' of chemicals
or amino acids.
Much indirect
evidence indicating evolution has been found. Many mechanisms have been
constructed that can explain evolution. But direct evidence for the
evolution theory has not yet been found. Barbour (223) says that no one
has observed the formation of a completely new species. The fossil
record shows very few really new species. In experiments, only
variations of existing species have been observed. Barbour (226-227)
also says that the origin of life and DNA are still unknown. Although
there are hypotheses, the question of how DNA could have developed is
still a 'chicken-and-egg' question.
The
Britannica also says that the fossil record is incomplete. To begin
with, only a small percentage of organisms are conserved as fossils,
and of this only a small part has been discovered. Despite the
Britannica's claim that the evolution theory is as well accepted among
scientists as 'the roundness of the Earth,' there are alternative
views. The 'intelligent design' theory is currently very much in the
public mind, because of a court case in the USA about whether the
intelligent design theory should be taught at school as an alternative
to the evolution theory (Goodstein 5/11/2005). Behe (2001, 247-250)
argues that organisms consist of 'irreducibly complex' biological
systems. These systems would be rendered useless if any component is
left out. They function only as a whole. Therefore they cannot have
developed gradually as the evolution theory says. There must have been
intelligent design.
Some
scientists are not convinced about the mechanism of chance. Cees
Dekker, a Dutch professor of nanotechnology, says in an interview that
he is very critical about the theory that life originated as a result
of chance. (Versluis 2004). Simon Conway Morris, a professor of
evolutionary palaeobiology at Cambridge, states in an interview that
evolution is not a random process but a process with direction leading
to a limited number of results. (Smit 2004).
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