There are three main accounts of Locke’s theory of action. According to what we might call the “Doing” theory of action, actions are things that we do (actively), as contrasted to things that merely happen to us (passively). If someone pushes my arm up, then my arm rises, but, one might say, I did not raise it. That my arm rose is something that happened to me, not something I did. By contrast, when I signal to a friend who has been looking for me, I do something inasmuch as I am not a mere passive recipient of a stimulus over which I have no control. According to some interpreters (e.g., Stuart 2013: 405, 451), Locke’s actions are doings in this sense. According to the “Composite” or “Millian” theory of action, an action is “[n]ot one thing, but a series of two things; the state of mind called a volition, followed by an effect” (Mill 1974 [1843]: 55). On this view, for example, the action of raising my hand is composed of (i) willing to produce the effect of my hand’s rising and (ii) the effect itself, where (ii) results from (i).  According to some interpreters (arguably, Lowe 1986: 120–121; Lowe 1995: 141—though it is possible that Lowe’s theory applies only to voluntary actions), Locke’s actions are composite in this sense. Finally, according to what we might call the “Deflationary” conception of action, actions are simply motions of bodies or operations of minds.