Liability and risk

Standard theories of liability say that X is liable to Y only if Y was harmed, only if X caused Y harm, and (usually) only if X was at fault. This article offers a series of criticisms of each of these claims, and use them to construct an alternative theory of liability in which the nature of X's having imposed a risk of harm on Y is central to the question of when X is liable to Y, and for how much. The article ends with some conjectures on ignorance as an excusing condition.