As indicated elsewhere, stories are really about inequities and their resolutions. When the four principal elements are considered in this light, the Problem element appears more like the essence of the inequity. The Solution becomes the essence of what is needed to restore balance. Depending upon the dynamics of the story, one of the four elements is “lifted up” as the prominent point of view. It becomes the Crucial Element upon which all other lesser inequities in the story center. It is Crucial because if it comes into balance all the remaining inequities of the story are forced to balance themselves as well. If not balanced, none of the others can be resolved.
From the Dramatica Theory Book