Historical paradigm shifts in defining life: from spontaneous generation and vitalism to the Pasteurian Wall and the quest for artificial creation
Bibliographic record
Abstract
For much of recorded history, the question “ Where does life come from? ” was answered with certainty: Aristotle’s doctrine of spontaneous generation and staged “ ensoulmen t” defined both natural philosophy and Christian scholasticism. Life, in this view, could spring from nonliving matter, and human personhood emerged only after a gradual developmental process. The Scientific Revolution began to unravel this consensus. Lavoisier’s chemistry embedded life within universal physical laws, while the invention of the microscope exposed previously invisible worlds. Science often advances through profound epistemic ruptures, not gradual accumulation. Individual discoveries acted as paradigm shifts that, together, constituted a non-Kuhnian revolution, redefining humanity’s understanding of nature. This study explores how successive revolutions in methods and technologies transformed both scientific and societal understandings of life’s origins. We distinguish four dimensions of their impact: technological (new instruments and techniques), ideological (emergent political and social philosophies), cultural (changes in art, literature, and everyday thought), and epistemological (shifts in what counts as knowable or real). Our analysis focuses primarily on the last, how each technological advance reconfigured the boundaries of knowledge itself. The chemical revolution, from Lavoisier’s demolition of phlogiston to Wöhler’s synthesis of urea, progressively undermined vitalism by showing that “organic” substances obey the same principles as inorganic matter. Pasteur ’s swan-neck flask experiments overthrew the millennia-old assumption of spontaneous generation and enshrined omne vivum ex ovo (“ all life comes from an egg ”) as biological dogma. Yet these advances built new intellectual boundaries, culminating in what we term the Pasteurian Wall , a barrier that has constrained experimental abiogenesis and remains unbreached today. By tracing these historical transformations, we show how revolutions in methods and technologies both expand and restrict the scope of inquiry, reshaping not only what we can investigate, but how we imagine life, its origins, and its possible artificial creation.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.007 | 0.007 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.007 | 0.070 |
| Scholarly communication | 0.008 | 0.018 |
| Open science | 0.001 | 0.006 |
| Research integrity | 0.003 | 0.007 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".