Developed trolley cases that probe the difference between diverting and using a person.
What informs this conversation?
Source-linked EthicAtlas explanations and critical context. Original texts are not bundled for this thinker.
Judith Jarvis ThomsonEthicAtlas explanation · paraphrase
Developed trolley cases that probe the difference between diverting and using a person.
Thomson used sharply constructed cases to examine rights, rescue, and bodily claims. Her trolley variations probe when redirecting a threat differs from involving another person as a means. Her violinist analogy challenges an inference from having a right to life to having a claim on someone else’s bodily assistance.
Thomson’s cases examine what particular people can claim against one another. The violinist challenges an inference from the right to life to a right to bodily assistance, while trolley variations ask about redirection, rescue, and sacrifice. These arguments rely on careful attention to the structure of a right. Having a serious interest does not automatically establish that any other person must supply the means to satisfy it, especially when that demand involves their body.
The strength of the method is precision; its vulnerability is the relevance of the analogy. Real situations contain responsibility, relationships, uncertainty, and alternatives that a case may bracket. A careful reader identifies the exact inference under examination instead of treating an intuitive response to one scenario as a complete policy argument.
To read a Thomson-style argument, identify the premise granted for discussion, the inference challenged, and what remains undecided. A thought experiment can refute a claimed implication without proving every conclusion on the wider topic. Test the argument by changing responsibility, consent, or the relationship between the parties. The method becomes stronger when a critic explains why a difference matters morally, rather than merely observing that no invented story exactly duplicates a real situation.
Editorial connection: Thomson’s trolley discussion compares cases of rescue and sacrifice.
Double effectEthicAtlas explanation · paraphrase
A foreseen harm can differ morally from harm intended as a means, subject to further conditions.
Double effect distinguishes intending harm, including harm used as a means, from foreseeing harm while pursuing a good end. Traditional formulations also require a permissible act, a sufficiently serious reason, and limits on how the good is achieved. Calling something a side effect does not alone establish permission.
Intention concerns what an agent adopts as an end or as a means of achieving it; foresight concerns what the agent expects to happen. Regretting a harm does not automatically make it unintended if the plan depends on producing it. Conversely, a foreseeable harm can remain a side effect. Traditional formulations also impose conditions on the act, the means, and proportionality. The distinction therefore offers a structured argument, rather than a general excuse for unwanted consequences.
Critics ask whether intention can bear so much moral weight or be reliably distinguished from foresight. An agent may describe a plan strategically to avoid acknowledging intended harm. Applying the doctrine therefore requires examining how the plan works, what the person is committed to achieving, and whether the harm is necessary.
Use an invented infrastructure case: repairing a dangerous bridge temporarily disrupts businesses, while deliberately closing a business to pressure its owner uses that disruption as part of the plan. Similar losses could result, but the losses play different roles in the explanation of action. In either case, ask about alternatives and avoidable burdens. Even a clearly unintended cost needs justification; classifying it correctly does not finish the assessment of what the decision maker owes.
Editorial connection: Thomson’s variants sharpen questions about what the doctrine explains.