Why Life Is Not DNA’s Way of Making More DNA

Abstract

The familiar slogan that life is “DNA’s way of making more DNA” captures an important truth about inheritance—but it does not explain what life is. This article clarifies why genes matter without mistaking them for the organising principle of living systems, introducing the APS view that life is viability-oriented organisation sustained through ongoing biological activity.

Part of the series: APS and Contemporary Theories

This article examines a major framework in biology or cognition and shows why it does not by itself explain what distinguishes living systems as viability-oriented, constraint-closed organisation. For the positive account, see What Is Life?.

A Familiar Idea — and Its Problem

You may have heard the phrase:

“Life is DNA’s way of making more DNA.”

It is memorable and captures something real: genetic material is copied across generations, and this continuity underlies evolution.

But as an explanation of life, the slogan quietly reverses the relationship it describes.

It suggests that organisms exist for DNA—that living systems are instruments of gene replication.

This inversion reflects a deeper orientation in scientific explanation.

APS Box — Analysis and Synthesis — Complementary Modes of Explanation

Scientific explanation can proceed through two complementary modes of analysis.

Analysis explains a system in terms of its components and their interactions.

Synthesis explains a component in terms of the wider system within which it operates.

Modern science has often privileged analysis, treating explanations that move toward smaller components as more fundamental. This tendency has encouraged reductionist interpretations in which genes, molecules, or particles are assumed to provide the deepest explanations.

APS rejects this asymmetry. Components and systems are mutually defining. Parts acquire biological significance through their role within organised systems, while systems exist only through the coordinated activity of their parts.

Biological explanation therefore requires both analysis and synthesis. The challenge is not to choose between components and organisation, but to understand how organised activity is maintained across multiple levels of biological organisation.

APS takes a different view.

Life is not organised for DNA. DNA operates within life.

APS Box — How APS Relates to Other Theoretical Frameworks

Contemporary frameworks such as control theory and nonlinear dynamical systems theory provide powerful and indispensable accounts of living systems. They explain how systems regulate their behaviour, maintain stability, and exhibit complex dynamics across time.

APS does not replace these approaches, nor does it reduce them to a single underlying model. Instead, it addresses a different question: what kind of organisation makes a system a living system in the first place.

Multiple theoretical frameworks can therefore apply to the same system, but they do so in different ways and address different explanatory questions. A dynamical systems description may characterise the system’s trajectories, and a control-theoretic model may describe its regulatory structure. These accounts are often non-reducible to one another, and each can be independently valid.

However, such accounts do not by themselves distinguish living systems from non-living systems. Many non-living systems also exhibit regulation, feedback, and complex dynamics.

APS contributes by specifying the organisational conditions under which a system must actively maintain its own viability. A system is viability-oriented when its processes are organised such that their effects contribute, directly or indirectly, to maintaining the conditions required for the system’s continued existence.

Importantly, in APS, viability is not defined by reference to life itself. It is specified in terms of the persistence of an organised system within a bounded region of possible states. A living system is therefore not defined in a circular sense as “that which maintains viability”, but as a system whose organisation is structured around maintaining these conditions.

In this sense, APS provides a way of identifying what makes a system a living system, rather than a general account of everything such a system does.

This does not mean that APS provides a complete or self-sufficient account of living systems. Describing how such systems behave, regulate, and evolve requires additional theoretical frameworks. APS specifies conditions that are necessary for identifying living systems, but it does not by itself exhaust the explanations required to understand them.

A complete scientific understanding of living systems therefore requires multiple forms of explanation. Dynamical and control-theoretic accounts explain how systems behave and regulate. APS clarifies the conditions under which such systems count as living systems at all.

Key Point:
Explaining regulation, dynamics, or behaviour is not the same as explaining what makes a system a living system. APS addresses this latter question by specifying the organisational conditions under which viability is maintained.

What the Slogan Gets Right

The slogan persists because it captures several genuine features of biology:

genetic material is reliably inherited
reproduction extends biological organisation through time
evolutionary change depends on heritable variation

These are not in dispute. Genes matter enormously: without them, the continuity of life as we know it would not be possible (Dawkins 1976, Noble 2006).

But identifying what is important is not the same as explaining what something is.

Gene-centred accounts capture inheritance and evolutionary change, but not the viability-oriented organisation that makes biological systems possible.

What It Leaves Out

The slogan treats replication as if it were the organising principle of life.

But replication does not occur on its own. DNA does not sustain itself. It does not gather resources, regulate its conditions, or repair its own context. For replication to occur, a whole system must already be in place—one that:

maintains internal organisation
regulates interactions with its surroundings
sustains the conditions under which copying is possible

These are not properties of DNA in isolation.

They are properties of living systems.

Life as Viability-Oriented Organisation

APS begins from a simple but powerful idea:

Life is the organisation of viability-oriented activity.

Living systems are not defined by what they are made of, but by what they do: they continuously sustain the conditions required for their own persistence.

This activity is:

self-regulating
responsive to changing conditions
organised across multiple interacting processes

In APS, this is called biological agency.

Within such systems, processes are linked in ways that maintain one another. This mutual dependence is described as constraint closure: the organisation of processes that collectively sustain the system that produces them.

Replication is one outcome of this organisation.

It is not, by itself, the condition that makes the organisation possible.

Why Genes Depend on Life

Once this shift is made, the role of DNA becomes clearer.

Genetic processes require:

energy supplied by metabolism
molecular machinery maintained by the system
regulation of when and how genes are expressed
stable conditions created by ongoing organisation

In other words, genes function only within systems that are already alive.

They do not, by themselves, create those systems. They operate within them.

Rethinking evolution

It is tempting to imagine evolution as genes competing for replication.

APS reframes this.

evolution is not adequately explained as the success of genes in isolation. It is the long-term transformation of organised, viability-oriented systems across generations.

From this perspective:

inheritance stabilises organisation, variation modifies organisation, and selection reflects the persistence of viable organisation

Genes play a central role in all of this.

APS does not deny the importance of hereditary mechanisms such as the Weismann barrier. In many organisms, genetic continuity is stabilised through relatively insulated germ-line transmission. However, heredity operates within larger systems of developmental, metabolic, ecological, and behavioural organisation that sustain viability across generations.

Genes therefore contribute to evolutionary continuity not in isolation, but as part of the organised systems that make hereditary processes possible in the first place.

This reorientation reflects a broader shift in explanatory perspective: from treating components as primary to understanding them within the organised systems that give them meaning (see Analysis, Synthesis, and the Direction of Explanation).

From this perspective, biological function is defined not by replication success alone, but by contribution to the viability of organised systems across time.

A Simple Analogy

Consider a building.

Blueprints are essential for constructing and reproducing it. But the stability of the building depends on the coordinated relations among its materials—foundations, supports, and structure.

The blueprint does not keep the building standing.

Similarly, genes contribute to biological organisation, but they do not sustain it. The persistence of a living system depends on the ongoing activity of the system as a whole.

The Shift in Perspective

The slogan “life is DNA’s way of making more DNA” compresses a complex process into a striking image.

But it also introduces a subtle inversion:

genes are treated as agents
living systems as instruments

APS restores the direction of explanation.

Living systems sustain themselves through viability-oriented activity. Within that activity, genetic processes help stabilise and transmit organisation across generations.

DNA replication is one of the things life does.

It is not the reason life exists.

Where This Leads

Understanding life in this way changes how we think about biology.

It shifts attention:

from components to organisation
from replication to persistence
from isolated mechanisms to integrated systems

Genes remain central to biology.

But they are no longer treated as the foundation of life itself.

They are part of a larger organisation—one that sustains itself, transforms over time, and makes inheritance possible.

Key Point
Life is not organised for DNA; DNA functions within viability-oriented organisation that sustains itself across time. In APS, purpose is not an externally imposed goal or a feature of genetic replication, but is grounded in the organisation of activity relative to viability.