Abstract
A common style of argument in the literature on free will and moral responsibility is the Manipulation Argument. These tend to begin with a case of an agent in a deterministic universe who is manipulated, say, via brain surgery, into performing some action. Intuitively, this agent is not responsible for that action. Yet, since there is no relevant difference, with respect to whether an agent is responsible, between the manipulated agent and a typical agent in a deterministic universe, responsibility is not compatible with the truth of determinism. This paper introduces some key types of manipulation cases, the schema for a manipulation argument against compatibilism, the hard-line/soft-line categories of responses to manipulation arguments, and various issues that have become important in discussions of manipulation cases and arguments.