Rhetoric in American movements tends to follow a standard pattern of rhetorical evolution:
Stage 1: Develops a language to articulate discontent. This language uses narratives, metaphors, and other rhetorical devices to capture the morality of the discontent. It is a language that identifies people together from their common sense of discontent. Movements will succeed in growing as they are able to articulate the discontent.
Stage 2: Identifies responsibility for the discontent. That is, the rhetoric develops a target for action. The scope of responsibility is a key to this move: class, society, system, or whatever. It brings a focus to responsibility. The rhetoric is often polemic, exaggerating the differences between the movement and its target. The rhetoric "perfects" this target, or creates the target's responsibility for the discontent.
Stage 3: Focuses and directs the energy of the movement toward the target. In this mature stage the movement celebrates its successes. It is a rhetoric rich in the experience of being in the movement, the satisfactions, the dreams of success, and the accomplishments of the movement's work. This is the rhetoric that motivates continued action toward the idealistic goal.