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Here is a survey of the main philosophical theories of causation and an evaluation of which account currently enjoys the strongest support—while also noting why many philosophers embrace a pluralistic stance.
Summary. Philosophers have developed several competing accounts of causation:
- Regularity theories tie causation to constant conjunctions of events: causes are regularly followed by their effects Stanford Encyclopedia of Philosophy.
- Counterfactual theories analyze causal claims in terms of “what would have happened otherwise”—most famously in David Lewis’s possible‐worlds formulation Stanford Encyclopedia of Philosophy.
- Probabilistic theories use probability theory to say causes are events that raise the probability of their effects Stanford Encyclopedia of Philosophy.
- Mechanistic (or process) theories explain outcomes by appealing to underlying structures or processes of interacting parts Stanford Encyclopedia of Philosophy.
- Interventionist/manipulationist theories (Woodward, Pearl) define X as a cause of Y if intervening on X changes Y in the corresponding hypothetical model FilelistStanford Encyclopedia of Philosophy.
- Agency or manipulability accounts emphasize that causes are handles for control or manipulation Stanford Encyclopedia of Philosophy.
Contemporary consensus often favors the interventionist approach—especially in scientific contexts—while acknowledging that no single view captures every causal discourse.
Major Theories of Causation
Regularity Theories
David Hume proposed that genuine causes and effects stand in patterns of invariable succession: whenever the cause occurs, so does the effect Stanford Encyclopedia of Philosophy. John Stuart Mill later refined this by insisting that such regularities be constituted by laws of nature; contemporary regularity theories maintain that these constant conjunctions ground our causal inferences Stanford Encyclopedia of Philosophy.
Counterfactual Theories
Counterfactual approaches define “C causes E” by the truth of a subjunctive conditional: had C not occurred, E would not have occurred. David Lewis’s (1973) possible‐worlds semantics remains the paradigm, modeling causation via the nearest‐possible‐world in which C is absent Stanford Encyclopedia of Philosophy.
Probabilistic Theories
Probabilistic accounts hold that causes are events that raise (or lower) the probability of their effects. They trace back to Suppes and Eells and today underpin statistical causal modeling, linking probability‐raising conditions to causal relationships Stanford Encyclopedia of Philosophy.
Mechanistic and Process Theories
Mechanistic theories explain phenomena by detailing the entities and activities that constitute the mechanism producing the effect. By specifying part‐whole structures and their activities, these accounts illuminate how causes bring about effects through sustained processes Stanford Encyclopedia of Philosophy.
Interventionist (Manipulationist) Theories
James Woodward’s interventionist account defines causal relationships via interventions: X is a cause of Y if, in an appropriate model, an (idealized) intervention on X would change Y FilelistStanford Encyclopedia of Philosophy. This framework underlies Pearl’s causal networks and has become a foundation for modern causal inference methods across disciplines.
Agency‐Based/Manipulability Theories
Some philosophers stress that causes serve as handles for control—treating causation as inherently tied to our ability to manipulate one variable to alter another. These theories highlight the pragmatic dimension of causal talk Stanford Encyclopedia of Philosophy.
Evaluating “Best” in Causation
Key Criteria
- Explanatory Power. Does the account illuminate why effects occur?
- Generality. Can it apply across domains (physics, biology, social science, everyday reasoning)?
- Scientific Fruitfulness. Does it align with and guide empirical methods?
- Ontological Parsimony. Does it avoid positing unnecessary metaphysical entities (e.g., unobservable powers)?
- Formal Precision. Is it amenable to rigorous modeling and inference?
Why Interventionism Leads
- Explanatory Power & Scientific Fruitfulness. Interventionism directly informs experimental design: if you can intervene on X and observe changes in Y, you’ve established a causal link Filelist.
- Generality & Formal Precision. It subsumes counterfactual and probabilistic aspects within structural‐equation frameworks, bridging quantitative modeling and conceptual clarity Stanford Encyclopedia of Philosophy.
- Ontological Economy. It dispenses with unverifiable powers, focusing instead on relations expressed in models subject to direct testing.
Nevertheless, mechanistic accounts remain indispensable in fields like biology and neuroscience, where specifying underlying processes is crucial.Similarly, probabilistic and counterfactual elements persist in statistical and philosophical analyses.
Conclusion: Causal Pluralism with an Interventionist Core
No single theory fully captures all uses of causal discourse. However, the interventionist/manipulationist framework currently offers the most robust, empirically grounded, and formally precise account for scientific and everyday causal reasoning—serving as the best “core” view. Mechanistic, probabilistic, and counterfactual insights complement this by addressing domains or questions—such as uncovering detailed processes or reasoning about singular events—where interventions alone may not suffice.
Thus, the best overall stance is a pluralistic synthesis centered on interventionism, enriched where necessary by mechanistic, probabilistic, or counterfactual considerations.
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