Manipulated Agents
Thought experiments featuring manipulated agents and designed agents have played a significant role in the literature on moral responsibility. What can we learn from thought experiments of this kind about the nature of moral responsibility? That is this book’s primary question. An important lesson lies at the core of its answer: Moral responsibility for actions has a historical dimension of a certain kind. A pair of agents whose current nonhistorical properties are very similar and who perform deeds of the same kind may nevertheless be such that one is morally responsible for the deed whereas the other is not, and what makes the difference is a difference in how they came to be as they are at that time—that is, a historical difference. Imagine that each of these agents attempts to assassinate someone. Depending on the details of the cases, it may be that one of these agents is morally responsible for the attempt whereas the other is not, because one of them was manipulated in a certain way into being in the psychological state that issues in the behavior whereas the other agent came to be in that state under his own steam. A variety of thought experiments are considered. They include stories about agents whose value systems are radically altered by manipulators, vignettes featuring agents who are built from scratch, and scenarios in which agents magically come into being with full psychological profiles.