Judith Jarvis Thomson; Killing, Letting Die, and The Trolley Problem, The Monist, Volume 59, Issue 2, 1 April 1976, Pages 204–217, https://doi.org/10.5840/monis.

It is clearly impermissible to kill one person because his organs can be used to save five others who are in need of transplants. It has seemed to many that the explanation for this lies in the fact that in such cases we would be intending the death of the person whom we killed, or failed to save. What makes these actions impermissible, however, is not the agent's intention but rather the fact that the benefit envisaged does not justify an (...) exception to the prohibition against killing or the requirement to give aid. The difference between this explanation and one appealing to intention is easily overlooked if one fails to distinguish between the prospective use of a moral principle to guide action and its retrospective use to appraise the way an agent governed him or herself. Even if this explanation is accepted, however, it remains an open question whether and how an agent's intention may be relevant to the permissibility of actions in other cases. \\\ [Jonathan Dancy] My first four sections concentrate on the second section of Professor Scanlon's contribution, where he lays out his conception of moral principles and of the role they play in theory and practice. I will raise questions on the following issues: 1. Scanlon's initial introduction of the notion of a principle. 2. His rejection of the standard view that principles are concerned with the forbidding, permitting and requiring of actions. 3. His rejection of pro tanto conceptions of principles in favour of a conception of them as conclusive. 4. The resulting account of what it is for a principle to face and survive exceptions. Scanlon's discussion of these matters here both appeals to and is in some respects more detailed than the relevant section of his recent What We Owe to Each Other. The topic is interesting both for the role played by principles in Scanlon's present discussion of intention and permissibility, and more generally because of his account of wrongness: an act is wrong iff it is ruled out by principles that nobody could reasonably reject. The remainder of my contribution is concerned with the ostensible focus of IP, namely the relevance of agent-intentions to the permissibility of what is done. (shrink)

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At the end of a thoughtful article on the future of nuclear war, Wiesner and York concluded that: "Both sides in the arms race are... confronted by the dilemma of steadily increasing military power and steadily decreasing national security. It is our considered professional judgment that this dilemma has no technical solution. If the great powers continue to look for solutions in the area of science and technology only, the result will be to worsen the situation.".

In this lecture I shall offer to make clear, deeply grounded, objective sense of a certain contrast: I call it the contrast between positive and negative instrumentality, and it shows up in ordinary speech in remarks about what happens because a person did do such and such, as against what happens because he did not. The line between positive and negative instrumentality lies fairly close to some others which are drawn by more ordinary bits of English. For instance, the difference (...) between positive and negative instrumentality in someone’s dying is cousin to the difference between killing a person and letting him die. The latter distinction has the advantage of being already encoded in plain. (shrink)