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James Woodward

James Woodward：科学哲学家，干预主义因果理论主要建构者，*Making Things Happen*
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ENTITY · JAMES WOODWARD · PITTSBURGH · INTERVENTIONIST CAUSATION · MAKING THINGS HAPPEN

James Woodward

Philosopher of science at the University of Pittsburgh — principal architect of the interventionist theory of causation

In Making Things Happen (2003), Woodward laid out a systematic interventionist framework: X has a direct causal effect on Y iff there is an intervention on X that, holding other variables fixed, changes Y. Its key property — non-reductive but non-circular: defining X–Y influence only invokes relations among variables other than X and Y. Compared with counterfactual semantics, interventionist semantics track scientific practice more closely.

Core interventionist framework
Four conditions on an intervention variable
A precise characterization of a “surgical” intervention — affects Y only via X, not through any other path
Non-reductive, non-circular
Defining X–Y influence via influence among other variables yields an acyclic network of definitions
Type-level focus
Primarily analyzes the general relation “X influences Y” — well suited to causal reasoning in scientific practice
Modularity (with Hausman)
Each structural equation can be independently broken by intervention — guaranteeing the feasibility and locality of interventions
Relations to other theorists
Parallel to Pearl
Independently developed an intervention-based formal framework, strongly complementary to Pearl’s do-calculus
Alternative to Lewis
Interventionist semantics replaces Lewis’s possible-world semantics — closer to the operational concepts of experimental science
→ Interventionist Theory · Causal Models · Judea PearlWoodward (2003) Making Things Happen

James Woodward

概述

James Woodward，美国科学哲学家，匹兹堡大学教授。Woodward 是干预主义理论的主要建构者，其著作 Making Things Happen (2003) 是当代因果哲学中最有影响力的作品之一。

因果理论贡献

干预主义因果理论

Woodward 在 Making Things Happen (2003) 中提出了系统的干预主义框架：

  • 核心定义：X 对 Y 有直接因果影响（相对于变量集 V），当且仅当存在对 X 的干预，在固定 V 中其他变量后，会改变 Y
  • 非还原但非循环：定义链中使用了”影响”概念，但定义 X-Y 之间的影响时只引用 X、Y 之外的变量之间的影响关系
  • 干预变量的精确刻画：四个条件确保干预是”手术性”的——只通过 X 影响 Y，不通过其他路径

类型影响的焦点

与许多关注个例因果的理论不同，Woodward 主要分析类型影响——一般性的”X 影响 Y”关系，而非特定事件之间的因果。这使他的理论特别适合科学实践中的因果推理。

模块性

Woodward（与 Hausman 合作）发展了因果模型的模块性概念：系统中的每个结构方程可以独立被干预破坏。这保证了干预的可行性和局部性。

与其他理论家的关系

  • Judea Pearl：独立发展了基于干预的形式化框架，两人的工作高度互补
  • David Lewis：Woodward 的干预语义替代了 Lewis 的可能世界语义
  • Hitchcock：在因果模型的哲学解释上有大量合作和对话

References

  • Stanford Encyclopedia of Philosophy, “The Metaphysics of Causation”, sources/sep-causation-metaphysics.md
  • Woodward, James, 2003, Making Things Happen, Oxford University Press