Teleonomy — Historical Solution and APS Reinterpretation

Abstract

Teleonomy was introduced in twentieth-century biology as a way to describe the apparent goal-directedness of living systems without invoking metaphysical teleology. While it provided a historically important solution, it remains conceptually unstable, often relying on evolutionary history to explain present-tense purposive organisation. This article clarifies teleonomy within the APS framework, showing that the phenomena it seeks to capture are more coherently grounded in viability-oriented, constraint-closed organisation. APS retains the naturalistic insight of teleonomy while resolving its limitations by identifying purpose as an intrinsic feature of living systems.

The Problem Teleonomy Was Introduced to Solve

Biological systems exhibit a striking form of organisation: they act in ways that appear directed toward the maintenance of their own existence. Organisms regulate internal conditions, repair damage, acquire resources, and reproduce. These activities have long been described as purposive or goal-directed.

Classical teleology explained such phenomena by invoking final causes or intrinsic purposes. However, with the rise of mechanistic science, teleological explanations came to be viewed as metaphysically problematic, associated with intention, design, or non-natural causes.

Teleonomy was introduced as a way to preserve the descriptive insight of goal-directedness while avoiding these commitments. It aimed to provide a naturalised account of purposive organisation compatible with evolutionary biology.

Classical Formulations of Teleonomy

In its standard formulation, teleonomy describes biological systems as exhibiting goal-directed behaviour that is the result of evolutionary processes. Organisms are said to act in accordance with “programs” shaped by natural selection, where these programs encode functional organisation accumulated over time.

From this perspective, purposive behaviour is explained by reference to:

historical selection
genetic or developmental programs
inherited functional organisation

Teleonomy therefore relocates purpose from present activity to evolutionary history. What appears goal-directed is understood as the outcome of processes that have selected for effective organisation over generations.

The Limits of Teleonomy

While teleonomy successfully avoids classical teleology, it does not fully resolve the conceptual problem it was designed to address.

Historical Displacement of Purpose

Teleonomy explains why certain traits or behaviours exist by appealing to their evolutionary history. However, this leaves open the question of why an organism’s activity is purposive in the present. The organism does not merely exhibit historically selected traits; it actively regulates its own conditions of existence.

Under-specification of Normativity

Teleonomic accounts often lack a clear account of why certain states matter to the organism here and now. While evolutionary history can explain the origin of functional traits, it does not fully explain the ongoing evaluative dimension of biological activity—why certain conditions are maintained and others resisted.

Conceptual Instability

As a result, teleonomy occupies an unstable position. It rejects teleology but retains its descriptive vocabulary, while grounding explanation in mechanisms that do not fully account for the phenomena in question.

APS: From Historical Explanation to Organisational Grounding

APS resolves these tensions by shifting the explanatory basis of purpose.

APS Box — What APS Adds to Contemporary Biology

Contemporary biology includes a range of approaches that move beyond reductionist explanations. These include systems theory, enactivism, the Extended Evolutionary Synthesis, constraint-based theories, and formal frameworks such as the Free Energy Principle.

Each of these captures an important aspect of living systems:

systems approaches describe interaction and dynamics
enactivism explains cognition as embodied sense-making
evolutionary extensions incorporate development and organism–environment interaction
formal frameworks model regulation under uncertainty

However, these approaches differ in their explanatory starting points and often lack a unified grounding.

APS does not replace these frameworks or compete with them as one theory among others. It clarifies the conditions under which their explanations apply.

In APS:

living systems are defined by viability-oriented, constraint-closed organisation
biological processes are normatively structured by their contribution to persistence
agency, process, and scale are co-constitutive aspects of living organisation

From this perspective, contemporary theories can be understood as capturing different dimensions of biological organisation, but not always specifying what makes that organisation biological.

Key Point. APS adds a unifying explanatory grammar: it grounds diverse biological theories in the organisational conditions required for life, clarifying their scope, limits, and points of integration.

In APS, purpose is not located primarily in evolutionary history, nor is it imposed as an external principle. Instead, it is grounded in viability-oriented, constraint-closed organisation.

Living systems are organised in such a way that their ongoing activity contributes to the maintenance of their own persistence. This activity is biological agency: the continuous regulation of conditions necessary for survival and reproduction.

From this perspective:

purpose is present-tense organisation toward viability
function is the operational expression of that organisation
evolution is the long-term transformation of viability-oriented organisation

This reframing eliminates the need to displace purposiveness into the past. The organism’s activity is purposive because of how it is organised, not merely because of how it evolved.

Normativity as an Intrinsic Feature of Life

A central advantage of the APS framework is its account of normativity.

In living systems, processes are not neutral. They are organised such that some states contribute to persistence while others lead to breakdown. This asymmetry is intrinsic to the system’s organisation and does not require external evaluation.

APS therefore grounds normativity in the organism itself:

what sustains viability is functionally significant
what undermines viability is functionally detrimental

This provides a clear account of why biological activity is evaluative in real time—something that teleonomic accounts struggle to specify.

Reinterpreting Teleonomy

From an APS perspective, teleonomy can be understood as an important but incomplete step in the naturalisation of purpose.

It correctly recognises that biological systems exhibit goal-directed organisation and that this organisation must be explained in naturalistic terms. However, by locating purposiveness primarily in evolutionary history, it does not fully account for the present-tense organisation of living systems.

APS retains the insight that purposiveness is natural, while grounding it directly in the organisation of biological systems. What teleonomy describes as goal-directed behaviour is more precisely understood as the activity of systems organised to maintain their own viability.

A Clarificatory Note on Bioteleology

If one wishes to distinguish this naturalised account of purpose from both classical teleology and teleonomy, it may be described as bioteleology: purpose grounded in the viability-oriented organisation of living systems.

This term is not required for the APS framework, which already specifies purpose, function, and normativity in precise terms. It serves only as a clarificatory label, highlighting that purposiveness in biology can be understood without appeal to intention, design, or purely historical explanation.

In Brief

Teleonomy was introduced to explain goal-directed behaviour in biological systems without invoking classical teleology. While it provided a historically important solution, it remains conceptually incomplete. APS resolves this by grounding purpose in viability-oriented, constraint-closed organisation, where normativity is intrinsic to living systems. Teleonomy can thus be reinterpreted as a transitional concept, capturing real phenomena but lacking a fully coherent explanatory foundation.