Within the Agency–Process–Scale (APS) framework, a biological value is a pattern of significance that emerges from the evaluative activities of living systems. Biological values reflect the relative importance of conditions, resources, relationships, or outcomes for viability, functioning, and adaptive persistence. They help guide behaviour, regulation, and adaptive responses across biological scales.

Biological values arise through the relationship between meaning and evaluation. Living systems continuously encounter conditions that matter for their continued functioning and organised persistence. These conditions possess biological meaning because they are significant to the organism or system. Through biological evaluation, organisms assess this significance in relation to their current circumstances, needs, and capacities. Repeated patterns of evaluation stabilise into biological values, which influence future behaviour and regulatory activity.

Within APS, biological meaning, biological evaluation, and biological value refer to related but distinct concepts. Biological meaning concerns significance. Biological evaluation concerns the assessment of significance. Biological value refers to the relatively stable patterns of importance that emerge from repeated evaluative activity. In simplified form:

Within APS, biological meaning concerns significance, biological evaluation concerns the assessment of significance, and biological value refers to the relatively stable patterns of importance that emerge from repeated evaluative activity.

Biological values are not restricted to conscious organisms. They occur wherever living systems differentially respond to conditions according to their significance for viability and adaptive persistence. A plant orienting growth toward light, a bacterium moving toward nutrients, or an animal avoiding danger all express forms of biological valuation. In each case, some conditions matter more than others because they contribute differently to continued functioning and organised persistence.

Biological values should not be confused with human values or moral values. Human values emerge from biological valuation but are transformed through symbolic cognition, language, culture, and social learning. Moral values represent a further development associated with norms, obligations, and ethical judgement. Biological values therefore provide part of the foundation from which human and moral values emerge, but they are not identical to either.

Within APS, biological values are understood as an expression of biological agency. Living systems do not merely undergo events; they actively regulate their interactions with the environment according to what matters for continued functioning and adaptive persistence. Biological values therefore help explain how significance becomes organised into adaptive patterns of behaviour and regulation across the living world.