Nomogenetic biology and its Western counterparts
Sabine Brauckmann, Kalevi Kull
Published in:
Naumov R.V., Marasov A.N., Gurkin V.A. (eds.) 1997. Lyubischevskie Chteniya
1997. Ul’yanovsk: Ul’yanovskij gosudarstvennyj pedagogicheskij universitet,
pp. 72-77.
[72]
The history of
theoretical biology has not yet been extensively reviewed by the historians of
science, and particularly the comparison between the work done in different
cultures is still a white spot on the map of biological sciences.
In
contrary to T.Kuhn's view on the development of science as a periodical
replacement of alternative paradigms, in the case of a more close and detailed
view on biology there could be seen a permanent and parallel co-existence of
alternative long-lasting approaches, which differ remarkably by their
dominance and spread in scientific community.
In such a way, e.g.,
von Baer's (1876) critics of Darwin and the antinomies of these two
approaches (Darwinian and Baerian) have been discussed in Russian biology
for a long time, in some cases with rather dramatic counter-effects, but a
comprehensive analysis of it is still absent (cf. Beloussov 1994; Graham 1993;
Mikulinskij, Polyanskij 1983). The non-Darwinian or anti-Darwinian views of
the the turn of the century have been quite well analysed by historians of
science (Bowler 1992), what is not the case concerning all the following
decades. This is true especially for the nomogenetic view formulated by the
Russian geographer Lev Berg (1926) and later developed by Aleksandr
Lyubischev (1968; 1982; Svetlov, Meyen 1982), Sergej Meyen (1979; 1988;
Meyen et al. 1977), and others (Chajkovskij 1990), even though without a
wider recognition yet, serving as a remarkable participant in the diversity of
types of biological explanation.
If one wants to frame this Russian
approach and to show on which path it is leading, one could state as follows.
From the point of view of making emphasis on typology, it is close to
structuralism (Schreider 1977). Emphasising the logical correctness in
biological discourse, and the exact definition of terms, it is close to Joseph
Woodger's (1929) early approach to deduce formally biological theory from a
few principles. Stressing the independence, or at least importance, of the laws
of form, it reminds D'Arcy Thompson, or later B.C.Goodwin, W.F.Gutmann,
A.Lima-de-Faria. Looking for rules and predictability in evolution, it may
remind B.Rensch (1961; 1970), or T.Eimer. Discussing with physicalists and
liking systemic holists, it is close to H.Driesch, and may be to L.v.Bertalanffy.
Criticizing the importance of natural selection in the evolution, it is close to
M.Kimura, or N.Eldredge and S.J.Gould (1977), or H.Paterson (1993). In later
or recent years, somewhat similar to the nomogenetic school views have been
represented by R.Thom (1972; 1975; 1983), S.Kauffman (1993), and also
S.Newman (1994), G.Müller, J.Mittenthal, et al. There has, however, probably
not been any corresponding equally strong anti-Darwinian school in Western
evolutionism after 1930s.
Due to the limited space we will confine
our remarks about the Western parallels to R.C.Lewontin and B.C.Goodwin,
choosing them as the most terse biotheoreticians of an anti-Darwinian
approach, and also considering their educational background - Lewontin is a
trained evolutionary geneticist and Goodwin a mathematical biologist - thus
representing two divergent realms of biology. Both of them are influenced by
the Cambridge Club of Theoretical Biology, especially by Needham, resuming
this biotheoretical concept of the 1920s and 30s, and further developed it.
Therefore, it is appropriate to give a short sketch of the most fundamental
statements of Needham.
[73]
J.Needham connected his approach of law-
determined evolution with thermodynamics. His basic statements on evolution
governed by laws set that during evolution the quantity of organic components
being necessary for development (ontogeny) enlarges and that simultaneously
the degree of complexity of the morphological forms and geometric relations
between the components increases qualitatively. By this process of complexity
the components of lower levels of organisation are enfolded like envelopes by
more complex ones. During the long periods of evolution the control functions
of the organisms became efficient, so that organisms become autonomous
entities towards their environment. Due to this autonomy they are qualified to
expand their activities in space to the extent that enables them to construct
their own environment. “A living organism is both a ‘patterned mixed-up-
ness’ and a ‘patterned separatedness’. ... The point is that the works of
organisation have a certain similarity at all levels of their operation”
(Needham 1976, 178).
According to Lewontin's (1985) approach, the
organisms are defined as subjects of evolution and objects for evolution. They
are subjects, because they can autonomously select what is relevant for them,
e.g. their food. Furthermore, they are able to exploit physical signals from the
environment. As an example may serve the phenomenon of external
fluctuations of temperature transformed by inner organs into (bio)chemical
signals. That is the reason, why neither environment nor organisms could be
comprehended as distinct and separated entities. Hence, both represent an
interlocked network. Applied to the feature of evolution, it means that the
relation between organisms and environment determines also the feature of
selection. According to Lewontin, ontogeny is a branching set of
developmental pathways taking organisms as unifying particles of external and
internal forces. It characterises organisms as the place of the interactions, by
which their survival is simultaneously conditioned. Every organism here
constructs its own environment, and participates to its self-construction and to
the creation of its environment being conditional for its survival. This does not
contradict to the statement that organisms are created by interaction of gene
and environment. Therefore, adaptation alone is not able to base and explain
morphological structure. Consequently, he concludes, one should speak of
construction instead of adaptation (Lewontin 1985, 104).
To
formulate it in a more detailed way, one could state, concerning the
relationship between gene and environment, that morphology, physiology,
metabolism, behaviour - shortly the phenotype - is the product of genes
(genetics) and environment. And exactly to this product the organism has
developed itself according to its spatial and temporary constraints.
“...Information from the environment modulates the biosynthetic pathways in
a way that matches the rate of activity to the demand for the product. ... The
arrows of causation point from gene and environment to organism. In fact,
however, the organism participates in its own development ... because it is the
determinant of its own milieu” (Lewontin 1985, 94, 96).
Lewontin
criticizes classical Darwinian population genetics for two reasons: firstly, it
ignored the organism, and secondly, it ascribed fitness to a given gene. These
failures or desiderata are caused by the initial question for which the theory
was constructed, namely, could a gene conferred a slight selective advantage
spread through a population and displace the former wild-type gene? For him
the entire body of theory is epistemologically incomplete (Lewontin 1974). To
elude such shortcomings he postulates a theory mapping the genotype to the
phenotype, by which the phenotype is related to fitness and by which changes
in phenotype refer to resulting changes in genotype.
In a
programmatic article written by him and S.J.Gould (Gould, Lewontin 1979,
581) they introduce against the adaptationist programme the statement, that
organisms
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must be analysed as integrated wholes controlled by Baupläne,
which on the other hand are constrained by phyletic heritage. In this
evolutionary model pathways of development and morphological structure
called architecture constraint themselves by delimiting mutational changes.
That means, these specific pathways are more important for evolution than
selective force that may mediate change when it occurs. For Gould and
Lewontin the adaptationist programme fails to distinguish current utility from
reasons for origin as well as to consider alternatives to adaptive stories.
Likewise they criticise it, because it forgets to consider adequately such
completing themes as random fixation of alleles, production of non-adaptive
structures by developmental correlation with selected features (e.g. allometry),
the separability of adaptation and selection, multiple adaptive peaks, and
current utility as an epiphenomenon of non-adaptive structures. Therefore, the
adaptationist programme is named Panglossian paradigm.
In this
context they refer to German paleontology, namely to O.H.Schindewolf,
A.Remane, and P.P.Grasse. For all of them natural selection can only explain
superficial modifications of the Bauplan that fit structure to environment. But
the construction of the Bauplan itself and transitions between Baupläne must
involve internal mechanisms. According to Gould and Lewontin such a strong
argument is too close to an appeal to mysticism. Therefore, they propose a
weaker argument by emphasising the importance of constraints for
developmental programmes (Gould, Lewontin 1979, 594). The constraints
themselves are divided in two categories, i.e. phyletic and developmental
being also a subcategory of phyletic restriction. Here Gould and Lewontin
refer explicitely to A.Seilacher (Seilacher 1970), for whom structural
restrictions cause architectural constraints for development, that never were
adaptations, but rather the necessary consequences of materials and designs
selected to build basic Baupläne.
Goodwin formulates a
structuralistic approach to biology which formally presupposes to static
structure a processual event borne by function. This is explained by the
statement, that such a forming process guarantees systemic wholeness,
holoblastic cleavage patterns, self-regulation and heredity. “Functionalism is
thus included in the dynamic structuralism that I have described because a
stable life cycle, an attractor in morphogenetic space, includes the environment
as part of the field dynamic that generates the form of the life history. ... It
[structuralism] involves developing a theory of organisms as processes - life
cycles ...” (Goodwin 1990, 238, 240). One should note here that heredity is
interpreted by memory, which causes a process of reproduction. “In other
words, genomic DNA is functionally and structurally as flexible and
changeable as the rest of the organisms” (Ho 1989, 32). Premise is, that a
limited number of realizable biological structures, determined by physico-
chemical constraints and being inherent in living organisms, are manifested in
evolution. The biogenic structure results from necessity determined by the
environment. In this context Goodwin refers to Goethe's dynamical archetype,
which is interpreted as a proto-element of a simply structured set of
transformations. “Thus, process structuralism can be viewed as a marriage of
rational morphology and neo-Darwinism” (Resnik 1994, 9).
The
structuralistic approach generates a dynamically floating morphologies,
because they are focused on the physiological variables - in contrary to
Turing's mathematical model for chemical morphogenesis. Formulated in
mathematical terms, dynamics causes a geometric form (gestalt). This
morphological pattern reacts to the former dynamical state, and by this
process, a topological geometry is constructed. For Goodwin, it is objectively
wrong to assume, that a set of chromosomes alone constitutes a finite class of
instructions or informations for determining a temporary order of events and
the details of morphology. Furthermore, he corrects the hypothesis, that DNA
of an organism is self-replicating, by referring to S.Spiegelman's (1967)
experimental data.
[75]
Concerning the problems of selection, it results from this
approach that the features of living systems are feasible by selection and could
be stabilised by it, too. “We could, if we wished, simply replace the term
natural selection with dynamical stabilization, the emergence of the stable
states in a dynamical system” (Goodwin 1994, 53). Consequently, the
Darwinian selection defined as a blind game by chance is not qualified to press
ahead the evolution. “This accounts for the equifinal nature of development
(Bertalanffy 1952), and also for the non-random nature of phylogeny”
(Lambert, Hughes 1989, 69).
To sum it up, the objective of biological
structuralism is to uncover the unity of dynamical process, by which the
structured manifoldness of forms (gestalten) is constructed and on which the
laws and principles of organization conceptually are based.
On the
place of conclusion, we will make an attempt to list the most fundamental
ideas of the nomogenetic school.
(1) Taxonomy of organisms should
be something like Mendeleyev's table of chemical elements, i.e. non-
phylogenetic, combinative classification. The natural classification should
reflect the internal laws of structure and variation without being phylogenetic,
while phylogenetic relations reflect history.
(2) Congruent to
taxonomy dealing with classification of organisms is meronomy, which
structures components of holistic systems, e.g., organs in
organisms.
(3) Natural selection plays the secondary and mainly
negative role in evolution. (Using a literary expression - in contrary to
Darwinism, environment cannot select, because the ability to select means
ability to choose, and it assumes subject; a subject, i.e. organism and not
environment, is able to make choices, to select. There is more than only a
difference in metaphor).
(4) A natural system could be built, although
evolution is often polyphyletic, and in many cases almost non-
reconstructable.
(5) Organisms of different taxa have different
archetypes, which determine their possible ways of evolution.
(6)
Morphogenetic rules rather than ecology is responsible for the limits and paths
of variation.
(7) The problems of form rather than function have the
primary importance.
An important note is that the adaptive evolution
may be important primarily at species and intraspecies levels, whereas the
statements of nomogenetic view work for higher taxa. For the nomogenetic
school the neo-Darwinian theory of evolution formally considers the
phenotype and genotype to be existing simultaneously. It means that there are
no any important theoretical conclusions made which could result from the
time difference of changes in phenotype and genotype. In this sense, what is
proposed is actually not a refutation of the neo-Darwinian theory, but a more
general view in which the possible time difference is added. It also means that
the theoretical object of biology is grasped in a basically more diverse way.
When the time difference is becoming equal to zero, i.e. the system is
simplified, we may get exactly the existing theory as a special case. Such a
generalisation is needed for finding a real place for nomogenetic factors in
evolution.
References
Baer K.E.v. 1876.
Über Darwins Lehre. - In: Baer K.E.v. Reden, gehalten in wissenschaftlichen
Versammlungen und kleinere Aufsätze vermischten Inhalts. Bd. 2. St-
Petersburg, 235-480.
Beloussov L. 1994. Russian biology: a personal
outlook. - Rivista di Biologia 87(1), 11-17.
Berg L.S. 1926/1969.
Nomogenesis or Evolution Determined by Law. Cambridge:
MIT.
[76]
Bowler P. 1992. The Eclipse of Darwinism: Anti-Darwinian
Evolution Theories in the Decades around 1900. Baltimore: The John Hopkins
University Press.
Chajkovskij Y.V. 1990. Elementy Evolyutsionnoj
diatropiki. Moskva: Nauka.
Goodwin B.C. 1990. Structuralism in
biology. - Scientific Progress Oxford 74, 227-243.
Goodwin B.C.
1994. How the Leopard Changed Its Spots: The Evolution of Complexity.
New York: Charles Scribner's sons.
Goodwin B.C., Sibatani A.,
Webster G.C. (eds.) 1989. Dynamic Structures in Biology. Edinburgh:
Edinburgh University Press.
Gould S.J. 1977. Ontogeny and
Phylogeny. Cambridge (Mass.): The Belknap Press.
Gould S.J.,
Lewontin R.C. 1979. The spandrels of San Marco and the Panglossian
paradigm: a critique of the adaptationist programme. - Proc. Royal Soc.
London B 205, 581-598.
Graham L.R. 1993. Science in Russia.
Cambridge: Cambridge University Press.
Ho M.-W. 1989. A
Structuralist of Process: Towards a Post-Darwinian Rational Morphology. - In:
Goodwin et al. (1989), 31-48.
Kauffman S.A. 1993. Origins of Order.
New York: Oxford University Press.
Kull K., Tiivel T. (eds.) 1988.
Lectures in Theoretical Biology. Tallinn: Valgus.
Lambert D.,
Hughes A.J. 1989. Keywords and Concepts in Structuralist and Functionalist
Biology. - In: Goodwin et al. (1989), 62-76.
Lewontin R.C. 1974.
The Genetic Basis of Evolutionary Change. New York: Columbia University
Press.
Lewontin R.C. 1985. The Organism as the Subject and Object.
- In: Levins R., Lewontin R.C. (eds.) The Dialectical Biologist. Cambridge:
Harvard University Press, 85-106.
Lyubischev A.A. 1968. Problemy
sistematiki. - In: Vorontsov N.N. (ed.) Problemy Evolyutsii, vol. 1.
Novosibirsk: Nauka, 7-29.
Lyubischev A.A. 1982. Problemy formy
sistematiki i evolyutsii organizmov: Sbornik statej. Moskva:
Nauka.
Meyen S.V. 1979. Mozhet li byt’ pobeditel’ v diskussii o
nomogeneze. - Priroda 9, 114-116.
Meyen S.V. 1988. On the
structure of theoretical biology. - In: Kull, Tiivel (1988), 15-
21.
Meyen S.V., Sokolov B.S., Schreider J.A. 1977. Klassicheskaya i
neklassicheskaya biologiya: Fenomen Lyubischeva. - Vestnik Akademii Nauk
10, 112-124.
Mikulinskij S.R., Polyanskij Y.I. (eds.) 1983. Razvitie
Evolutsionnoj Teorii v SSSR (1917-1970-e Gody). Leningrad:
Nauka.
Needham J. 1976. Moulds of Understanding. A Pattern of
Natural Philosophy (ed. by G.Wersky), London: Allan &
Unwin.
Newman S.A. 1994. Generic physical mechanisms of tissue
morphogenesis: A common basis for development and evolution. - J. evol.
Biol. 7, 467-488.
Paterson H.E.H. 1993. Evolution and the
Recognition Concept of Species: Collected Writings. Baltimore: The John
Hopkins University Press.
Rensch B. 1961. Die Evolutionsgesetze
der Organismen in naturphilosophischer Sicht. - Philosophie naturalis, 6, 288-
326.
[77]
Rensch B. 1970. Neuere Probleme der Abstammungslehre (3.
Aufl.). Stuttgart: Fischer.
Resnik D. 1994. The rebirth of rational
morphology: process structuralism's philosophy of biology, Acta Biotheoretica
42, 1-14.
Schreider J.A. 1977. A.A.Lyubischev kak strukturalist. -
Trudy po Znakovym Sistemam (Tartu) 9, 133-134.
Seilacher A.
1970. Arbeitskonzept zur Konstruktionsmorphologie - Lethaia 3, 393-
396.
Spiegelman S. 1967. An in vitro analysis of a replicating
molecule. - American Scientist 55, 221-264.
Svetlov P.G., Meyen
S.V. (eds.) 1982. Aleksandr Aleksandrovich Lyubischev 1890-1972.
Leningrad: Nauka.
Thom R. 1972. Structuralism and Biology. - In:
Waddington (1972), 68-82.
Thom R. 1975. Structural Stability and
Morphogenesis: An Outline of a General Theory of Models. London:
Benjamin.
Thom R. 1983. Mathematical Models of Morphogenesis.
Chichester: Horwood.
Waddington C.H. (ed.) 1968-1972. Towards a
Theoretical Biology. I: Prolegomena (1968), II: Sketches (1969), III: Drafts
(1970), IV: Essays (1972). Edinburgh: University Press/Chicago: Aldine-
Atherton.
Woodger J.H. 1929/1948. Biological Principles: A Critical
Study (2nd ed.). London: Routledge.
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