This article argues that the concept of moodiness provides significant resources for developing a more robust pragmatist theory of action. Building on current conceptualizations of agency as effort by relational sociologists, it turns to the early work of Talcott Parsons to outline the theoretical presuppositions and antinomies endemic to any such conception; William James and John Dewey provide an alternative conception of effort as a contingent rather than fundamental form of agency. The article then proposes a way forward to a nonvoluntarist theory of action by introducing the notion of moodiness, highlighting how the concept permits a richer conceptualization of actors’ prereflexive involvement in and relatedness to nonneutral, demanding situations. Effort is reconceptualized as a moment in a broader process of action, where the mood is fragile and problematical. Finally, the article draws all of these elements together in an outline of a unified portrait of the pragmatist action cycle that includes both creativity and moodiness as essential moments.