How is the collective behavior approach different from the resource mobilization approach in understanding how social movement works? How did Stark reconcile their differences?
To summarize, essentially the collective behavior approach understands social movements as grass root, bottom up collective behaviors. It focuses on the emotional, spontaneous aspects of a social movement. In contrast, the resource mobilization theory understands social movements as carefully crafted, elite engineered rational behaviors. It focuses on the mobilization of human and material resources (including pre-existing social networks), alliance building, media spinning, and the give-and-take collective bargaining within social movements. Stark wanted to use the collective behavior approach to explain the start of a social movement and to use the resource mobilization approach to explain the success or failure of a social movement.