Teleonomy is the quality of apparent purposefulness and of goal-directedness of structures and functions in living organisms that derive from their evolutionary history, adaptation for reproductive success, or generally, due to the operation of a program. Teleonomy is related to programmatic or computational aspects of purpose.
The term was coined to stand in contrast with teleology, which applies to ends that are planned by an agent which can internally model/imagine various alternative futures and, enables intention, purpose and foresight. A teleonomic process, such as evolution, produces complex products without the benefit of a guiding foresight.
Evolution largely hoards hindsight, as variations unwittingly make "predictions" about structures and functions which could successfully cope with the future, and participate in an audition which culls the also-rans, leaving winners for the next generation. Information accumulates about functions and structures that are successful, exploiting feedback from the environment via the selection of fitter coalitions of structures and functions. These features also have been described by Robert Rosen as an anticipatory system which builds an internal model based on past and possible futures states.
Richard Dawkins described the properties of "archeo-purpose" by natural selection and "neo-purpose" by evolved adaptation, in his talk on the "Purpose of Purpose." As an evolutionary feature, the brain's flexibility in adapting or subverting goals was attributed to making neo-purpose goals on an overarching evolutionary archeo-purpose. Language allows groups to share neo-purposes and cultural evolution, occurring much faster than natural evolution, can lead to conflict or collaborations.
In the later part of his working with a theory of social evolution and a related theory of world-history, Talcott Parsons adopted the concept of teleonomy as the fundamental organizing principle for directional processes and his theory of societal development in general. In this way, Parsons tried to find a theoretical compromise between voluntarism as a principle of action and the idea of a certain directionality in history.
In behavior analysis, the adverbial distinction between purposefulness, having an internal determination and purposiveness, serving or effecting a useful function was made by Hayne Reese. Reese implies that non-teleological statements are called teleonomic when they represent an "if A then C" phenomenon's antecedent; where, teleology is a consequent representation. The concept of purpose, as only being the teleology final cause, requires impossible time reversal; because, the future consequent determines the present antecedent. Purpose, as being both in the beginning and the end, simply rejects teleology, and addresses the time reversal problem. In this, Reese sees no value for teleology and teleonomic concepts in behavior analysis; however, the concept of purpose preserved in process can be useful, if not reified.
In 1958, Colin Pittendrigh applied the term to biology:
Biologists for a while were prepared to say a turtle came ashore and laid its eggs. These verbal scruples were intended as a rejection of teleology but were based on the mistaken view that the efficiency of final causes is necessarily implied by the simple description of an end-directed mechanism. … The biologists long-standing confusion would be removed if all end-directed systems were described by some other term, e.g., ‘teleonomic,’ in order to emphasize that recognition and description of end-directedness does not carry a commitment to Aristotelian teleology as an efficient causal principle.
In 1962, Grace A. de Laguna's "The Role of Teleonomy in Evolution" fleshed the applicability of the term to biological history and adaptation.
In 1965 Ernst Mayr cited Pittendrigh and criticized the last few words cited above for not making a “clear distinction between the two teleologies of Aristotle”; evolution involves Aristotle's material causes and formal causes rather than efficient causes. Mayr adopted Pittendrigh’s term, but supplied his own definition:
It would seem useful to rigidly restrict the term teleonomic to systems operating on the basis of a program of coded information. (p.42)
In 1966 George C. Williams approved of the term in the last chapter of his Adaptation and Natural Selection; a critique of some current evolutionary thought. In 1970, Jacques Monod, in Chance and Necessity, an Essay on the Natural Philosophy of Modern Biology, suggested teleonomy as a key feature that defines life:
Rather than reject this [goal-directedness] idea (as certain biologists have tried to do) it is indispensable to recognise that it is essential to the very definition of living beings. We shall maintain that the latter are distinct from all other structures or systems present in the universe through this characteristic property, which we shall call teleonomy.
[..] It will be readily seen that, in this or that species situated higher or lower on the animal scale, the achievement of the fundamental teleonomic project (i.e., invariant reproduction) calls assorted, more or less elaborate and complex structures and performances into play. The fact must be stressed that concerned here are not only the activities directly bound up with reproduction itself, but all those that contribute-be it very indirectly-to the species' survival and multiplication. For example, in higher mammals the play of the young is an important element of psychic development and social integration. Therefore this activity has teleonomic value, inasmuch as it furthers the cohesion of the group, a condition for its survival and for the expansion of the species.
In 1974 Ernst Mayr illustrated the difference in the statements:
"The Wood Thrush migrates in the fall in order to escape the inclemency of the weather and the food shortages of the northern climates."
"The Wood Thrush migrates in the fall and thereby escapes the inclemency of the weather and the food shortages of the northern climates."
If we replace the words ‘in order to escape’ by ‘and thereby escapes’, we leave the important question unanswered as to why the Wood Thrush migrates. The teleonomic form of the statement implies that the goal-directed migratory activity is governed by a program. By omitting this important message the second sentence is greatly impoverished as far as information content is concerned, without gaining in causal strength.
Subsequently philosophers like Ernest Nagel further analysed the concept of goal-directedness in biology and by 1982, philosopher and historian of science David Hull joked about the use of teleology and teleonomy by biologists:
Haldane [in the 1930s] can be found remarking, ‘Teleology is like a mistress to a biologist: he cannot live without her but he’s unwilling to be seen with her in public.’ Today the mistress has become a lawfully wedded wife. Biologists no longer feel obligated to apologize for their use of teleological language; they flaunt it. The only concession which they make to its disreputable past is to rename it ‘teleonomy’.
In teleology, Kant's positions as expressed in Critique of Judgment, were neglected for many years because in the minds of many scientists they were associated with vitalist views of evolution. Their recent rehabilitation is evident in teleonomy, which bears a number of features, such as the description of organisms, that are reminiscent of the Aristotelian conception of final causes as essentially recursive in nature. Kant's position is that, even though we cannot know whether there are final causes in nature, we are constrained by the peculiar nature of the human understanding to view organisms teleologically. Thus the Kantian view sees teleology as a necessary principle for the study of organisms, but only as a regulative principle, and with no ontological implications.
Teleonomy is closely related to concepts of emergence, complexity theory and self-organizing systems. It has extended beneath biology to be applied in the context of chemistry. Some philosophers of biology resist the term and still employ "teleology" when analyzing biological function and the language used to describe it. while others endorse it.
- Anthropic principle
- Chance and Necessity
- Naturalism (philosophy)
- Omega Point
- Religious naturalism
- Telic Recursion
- Theistic evolution
- Reese, Hyne W. (1994). "Teleology and Teleonomy in Behavior Analysis". The Behavior Analyst 17 (1): 75–91. PMC 2733687. PMID 22478174.
- Pittendrigh, C. S. "Adaptation, natural selection, and behavior," in Behavior and Evolution, ed. A. Roe and George Gaylord Simpson, New Haven: Yale University Press, 1958, 390–416; p. 394.
- de Laguna, Grace A. (April 1962). "The Role of Teleonomy in Evolution". Philosophy of Science 29 (2): 117–131. doi:10.1086/287855. JSTOR 186539.
- Mayr, E. (1965). "Cause and effect in biology". In Lerner, D. Cause and effect. New York: Free Press. pp. 33–50.
- Williams, G.C. (1966). Adaptation and natural selection; a critique of some current evolutionary thought. Princeton, NJ: Princeton University Press. ISBN 0-691-02615-7.
- Monod, Jacques (1971). Chance and Necessity: An Essay on the Natural Philosophy of Modern Biology. New York: Alfred A. Knopf. ISBN 0-394-46615-2.
- Mayr, E. (1974). "Teleological and Teleonomic, a New Analysis". Boston Studies in the Philosophy of Science 14.
- Nagel, E. (1977). "Teleology Revisited: Goal-Directed Processes in Biology". Journal of Philosophy 74 (5): 261–301. doi:10.2307/2025745. JSTOR 2025745. Reprinted in Allen, Bekoff & Lauder, 1998.
- Hull, D.L. (1982). "Philosophy and Biology". In Fløistad, Guttorm. Philosophy of Science. Contemporary Philosophy: A New Survey 2. Hague: Nijhoff. pp. 280–316. ISBN 90-247-2518-6.
- Huneman, Philippe (2007). Understanding Purpose. University of Rochester Press. pp. 1–37. ISBN 1-58046-265-0.
- Christensen, W.D. (1996). "A complex systems theory of teleology" (PDF). Biology and Philosophy 11 (3): 301–320. doi:10.1007/BF00128784.
- Lifson S (May 1987). "Chemical selection, diversity, teleonomy and the second law of thermodynamics. Reflections on Eigen's theory of self-organization of matter". Biophys. Chem. 26 (2–3): 303–11. doi:10.1016/0301-4622(87)80031-5. PMID 3607231.
- Pross, Addy (August 2005). "On the Chemical Nature and Origin of Teleonomy". Origins of Life and Evolution of Biospheres 35 (4).
- ibid. On the Chemical Nature of Purpose (Teleonomy), Journal of 18th Conference on Physical Organic Chemistry
- Neander, K. (1991). "The Teleological Notion of 'Function'". Australasian Journal of Philosophy 69 (4): 454–468. doi:10.1080/00048409112344881.
- Nissen, Lowell (1997). Teleological Language in the Life Sciences. Rowman & Littlefield. ISBN 0-8476-8694-9.
- Kober, G. "Teleology's New Clothes: Teleonomy and the Notion of Program", International Society for the History, Philosophy, and Social Studies of Biology (Feb 14, 2005)
Alfredo Marcos, "Teleología y teleonomía en las ciencias de la vida", Diálogo Filosófico, nº 22, pp. 42–57, Madrid, 1992
- Allen, C., M. Bekoff, G. Lauder, eds., Nature’s Purposes: Analyses Of Function and Design in Biology. MIT Press, 1998. (ISBN 0-2625-1097-9)
- Mayr, E., The Growth of Biological Thought. Diversity, Evolution, and Inheritance. Cambridge (MA): Belknap Press of Harvard University Press, 1982 : pp. 47-51 (differentiating four kinds of teleology).
- Mayr, E., What Makes Biology Unique?: Considerations on the Autonomy of a Scientific Discipline, Cambridge University Press, 2004. (ISBN 0-5218-4114-3).
- Ruse, M. Darwin and Design, Harvard University Press; 2004. (ISBN 0-6740-1631-9)
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