Mill’s harm principle is commonly supposed to rest on a distinction between self-regarding conduct, which is not liable to interference, and other-regarding conduct, which is. As critics have noted, this distinction is difficult to draw. Furthermore, some of Mill’s own applications of the principle, such as his forbidding of slavery contracts, do not appear to fit with it. This article proposes that the self-regarding/other-regarding distinction is not in fact fundamental to Mill’s harm principle. The sphere of protected liberty includes not (...) only self-regarding conduct, but also actions that affect only consenting others. On the other hand, the occasional permissibility of interfering with self-regarding conduct can plausibly be explained by reference to the agent’s consent. Thus, the more important distinction appears to be that between consensual and non-consensual harm, rather than that between the self-regarding and non-self-regarding action. That is, interference can be justified in order to prevent non-consensual harms, but not to prevent consensual harms. It is argued that the harm principle, thus reformulated, both captures Mill’s intentions and is a substantively plausible position. (shrink)

Consider the multi-user virtual worlds of online games such as EVE and World of Warcraft, or the multi-user virtual world of Second Life. Suppose a player performs an action in one of these worlds, via his or her virtual character, which would be wrong, if the virtual world were real. What is the moral status of this virtual action? In this paper I consider arguments for and against the Asymmetry Thesis: the thesis that such virtual actions are never wrong. I (...) also explain how the truth of the Asymmetry Thesis is closely aligned with the possibility of what Edward Castronova has called closed synthetic worlds. With some qualifications, the ultimate conclusion is that the Asymmetry Thesis is false and that these closed worlds are impossible. (shrink)