Theories Are Beings with Life Cycles
metaphor
Source: Life Course → Intellectual Inquiry
Categories: cognitive-sciencelinguisticsphilosophy
From: Master Metaphor List
Transfers
Theories are born, mature, grow old, and die. This metaphor gives intellectual constructs a biographical arc, making it natural to ask how old a theory is, whether it is still vigorous, and when it might expire. The Master Metaphor List (Lakoff, Espenson & Schwartz 1991) catalogs it as part of the THEORIES cluster, alongside THEORIES ARE BUILDINGS, THEORIES ARE CLOTH, and THEORIES ARE CONSTRUCTED OBJECTS. Where the building metaphor highlights structural integrity, the life-cycle metaphor highlights temporal trajectory and vitality.
Key structural parallels:
- Birth — “Relativity was born out of the failure of the Michelson-Morley experiment.” “Keynesian economics emerged in the 1930s.” Theories have origin stories, and the birth metaphor gives them a specific moment of inception, often linked to a crisis or breakthrough that makes the new theory necessary.
- Growth and maturation — “The theory matured over the next decade.” “Game theory is still a young discipline.” Young theories are incomplete and fragile; mature theories are richly developed and well-defended. The metaphor imports the assumption that development is good — a theory that stays immature is failing.
- Health and vigor — “String theory is alive and well.” “Phlogiston theory was already ailing by the 1770s.” A healthy theory attracts adherents, generates research programs, and responds productively to challenges. A sick theory is losing explanatory power, accumulating anomalies, and failing to inspire new work.
- Reproduction — “Darwinism gave birth to neo-Darwinism, sociobiology, and evolutionary psychology.” Theories produce offspring — successor theories, subdisciplines, and applications that carry forward the parent’s core insights while adapting to new contexts.
- Death — “Vitalism is dead.” “Phrenology died in the nineteenth century.” The metaphor makes theoretical abandonment feel like natural death — inevitable, final, and not requiring further explanation. A dead theory is one that no active researcher defends.
Limits
- Theories don’t age biologically — organisms deteriorate because of entropy and cellular decline. Theories have no intrinsic aging process. The life-cycle metaphor makes old theories feel tired and spent, but a theory’s age has no bearing on its truth. Euclidean geometry is over two millennia old and remains perfectly valid within its domain. The metaphor prejudices us against old ideas simply because they are old.
- Dead theories come back — in biology, death is irreversible. In intellectual history, it is not. Atomism was “dead” for centuries before being revived by Dalton. Lamarckian inheritance was “dead” before epigenetics gave it new life. The life-cycle metaphor has no vocabulary for resurrection, reincarnation, or undeath — yet these are common patterns in the history of ideas.
- The metaphor obscures institutional power — if theories live and die on their own, then the social forces that sustain or suppress them become invisible. A theory can be “killed” not by evidence but by the death of its champions, the defunding of its research programs, or political suppression. The life-cycle metaphor makes these violent interventions look like natural causes.
- Growth is not always progress — a theory can “grow” in the sense of gaining adherents and generating publications while becoming increasingly disconnected from reality. The life-cycle metaphor conflates institutional success with intellectual merit, because in organisms, growth is generally a sign of health.
- The metaphor individualizes what is ecological — organisms exist in ecosystems, but the life-cycle metaphor focuses on the individual biography. Theories exist in intellectual ecosystems too — they depend on rival theories, adjacent disciplines, methodological innovations, and funding structures. The biographical focus obscures these systemic dependencies.
Expressions
- “The birth of quantum mechanics” — the origin of a theory as biological birth (Lakoff, Espenson & Schwartz 1991)
- “The theory has matured considerably” — intellectual development as biological maturation (common academic usage)
- “That hypothesis is still in its infancy” — an undeveloped theory as a newborn (common academic usage)
- “String theory is alive and well” — continued research activity as vitality
- “Vitalism is dead” — theoretical abandonment as death
- “Darwinism gave birth to several successor theories” — intellectual derivation as biological reproduction
- “The theory is showing its age” — accumulated anomalies as senescence
- “A moribund research program” — declining intellectual activity as approaching death (Lakatos 1978)
Origin Story
The metaphor appears in the Master Metaphor List (Lakoff, Espenson & Schwartz 1991) as part of the THEORIES cluster. It is closely parallel to BELIEFS ARE BEINGS WITH A LIFE CYCLE, which maps the same source domain onto individual convictions rather than formal intellectual constructs. The theory variant is particularly prominent in philosophy of science, where Kuhn’s paradigm shifts (1962) and Lakatos’s research programs (1978) both rely heavily on life-cycle vocabulary: paradigms are “born” in revolutions, “mature” during normal science, and “die” when anomalies accumulate beyond repair.
The metaphor also connects to the broader IDEAS ARE PEOPLE mapping. But where IDEAS ARE PEOPLE emphasizes agency (ideas influence, persuade, compete), THEORIES ARE BEINGS WITH LIFE CYCLES emphasizes the temporal trajectory — the inevitability of birth, aging, and death — without necessarily granting theories full personhood.
References
- Lakoff, G., Espenson, J. & Schwartz, A. Master Metaphor List (1991), “Theories Are Beings with Life Cycles”
- Kuhn, T.S. The Structure of Scientific Revolutions (1962) — paradigm life cycles as the engine of scientific change
- Lakatos, I. “Falsification and the Methodology of Scientific Research Programmes” (1978) — research programs as entities that can be “progressive” or “degenerating”
- Fleck, L. Genesis and Development of a Scientific Fact (1935) — an early account of how thought styles are born and evolve
Related Entries
Structural Neighbors
Entries from different domains that share structural shape. Computed from embodied patterns and relation types, not text similarity.
- Make Hay While the Sun Shines (agriculture/metaphor)
- Separate the Wheat from the Chaff (agriculture/metaphor)
- Ideas Are People (social-roles/metaphor)
- Incentive-Caused Bias (/mental-model)
- Amara's Law (perception-and-cognition/mental-model)
- Odyssey (mythology/metaphor)
- Emotions Are Weather (weather/metaphor)
- External Conditions Are Climate (natural-phenomena/metaphor)
Structural Tags
Patterns: pathaccretionsplitting
Relations: transformcause
Structure: cycle Level: generic
Contributors: agent:metaphorex-miner