Most philosophers of action have seen little or no connection between the individuation of action and questions of freedom and responsibility. Is this a mistake? According to a recent suggestion by Fred Dretske it may be. Dretske views overt actions not as observable events with a distinctive sort of causal history, but rather as causal sequences, in which a distinctive sort of inner cause produces the appropriate outcome. So when Jimmy voluntarily wiggles his ears, the motion of his ears is not his action; it is only a component of the action, its result. The entire action consists in an event-causal sequence wherein an inner event C causes the result: it is C’s causing the motion of Jimmy’s ears.

When Booth moved his finger, thereby firing a gun, thereby killing Lincoln, did he perform three discrete actions, or were there relations of identity or inclusion among them? Most treatments of this problem have tended to assume there is but one sort of entity properly to be called an action, and hence that one answer to this question must be established to the exclusion of all others. And the favored answer has been that Booth's actions are not discrete, or indeed even overlapping, but identical. It is possible, however, to adopt a more conciliatory spirit, in which a place is sought for talk of discrete or fine-grained actions in cases like this, as well as for entities of the coarser sort most have favored.