Most people readily agree that suicide is caused by a complex web of many different factors. However, for many people the concept of a single event resulting from the combined effect of a constellation of different factors (multiple causation) is imperfectly understood. Unfortunately, a naive understanding of multiple causation can lead to needless arguments about what “really” causes suicide, and pointless debate about the “right” point for preventive intervention. In this paper, I review several simple conceptual models of multiple causation as they relate to suicide prevention. I suggest that a more explicit understanding of the nature of multiple causation has the potential to obviate some of these misguided arguments and to facilitate cooperative prevention efforts among person who choose to apply their energies at different points in the causal chain of