 As Jay Rosenberg noted (1983, p. 22, 103), sometimes when we speak of a life we mean to refer to the events that make up something’s history—the things that it did and the things that happened to it. (For example, the publication of The Problems of Philosophy was one of the events that made up one life, namely Bertrand Russell’s.) Yet a rock and a corpse have histories, and neither has a life. Presumably, then, ‘a life,’ in the sense we are discussing, refers to the history of something that is alive. In that case what we are really looking for is clarification of a property, not an event. We want clarification of what it is to be alive.