Some considerations on causality supplementing the study A short essay on causality.
In Aristotelian physics (cf. Physics II), the explanation of a natural process requires the articulation of four distinct causes, which represent its different aspects, separable by logos: the matter of which a thing is made (material cause), the form or essence that defines it (formal cause), the agent that triggers the change (efficient cause), and the purpose for the sake of which the process takes place (final cause). In biological cycles, such as the transition from acorn to oak (Aristotle’s own example), the final cause does not represent an external intention, but an immanent (internal) necessity: the entity realizes its optimal completed form and tends to perpetuate it.
It is precisely in this biological and cyclic domain, however, that the teleological framework (i.e., the orientation of a process toward an end) reveals its primary logical aporia. Subordinating the process to the attainment of the telos creates a circularity within the model: if the acorn’s purpose is the oak tree, but the oak tree’s purpose is to produce new acorns for the preservation of the species, the causal explanation resolves into a recursiveness that describes the repetition of form without explaining its generative mechanism.
The scientific revolution and modern physics have radically deconstructed this framework, demonstrating that teleological scaffolding is superfluous for understanding the dynamics of the physical world. The entire explanation of cosmic order has been reorganized around the efficient cause alone, reinterpreted in terms of conservation laws and fundamental interactions.
The modern reinterpretation of causality hinges on several decisive conceptual points:
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Asymmetric temporal orientation: The causal sequence admits only a single direction toward the future. The idea that a state not yet realized (the telos) could exert a causal pull or guidance on the present constitutes a logical inversion unsustainable by physical inquiry.
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Dynamic sufficiency of local interactions: A system’s initial conditions, together with force fields, energy exchanges, and thermodynamic laws, provide a complete and self-sufficient description of any transformation. Regular phenomena do not occur for the sake of a global benefit or result, but emerge as a necessary consequence of local micro-interactions.
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Complexity as a retroactive effect: Where ancient philosophy saw the operation of an immanent end —such as in the morphology of living organisms— modern biology recognizes the a posteriori outcome of natural selection and genetic information. The apparent teleology of biological order is the contingent result of a process of differential stability, not its motivational premise.
With all due respect to the “maestro di color che sanno”, the elimination of the final cause has not reduced nature to a chaotic aggregate; rather, it has revealed its structural coherence: the capacity of physical systems to generate complexity and organization from mechanical dynamics devoid of any final orientation.
