 According to many conceptions of causation, causes are local in various senses: First, causes are synchronically local: they are “smallish,” spatially localized events—or at least their size is proportionate to the size of the effect under consideration. If we demand locality in this sense, then this puts into sharper focus one of the horns of the trilemma posed by the dominant cause: we cannot identify the state on an entire time-slice S as the cause of an event in the future of S on pains of violating the locality constraint that causes be spatio-temporally localized.