It is difficult to know exactly what your question is getting at as the narration of the story reflects on a great number of issues as they describe the action of the play.  One of the most prominent is the idea of class and class conflict.

From the beginning of the story to the end, there are catalogued abuses of the poor by the rich and the absolutely blind eye turned to the plight of the poor as they eat grass, or in one particular example as the Marquis St. Evremonde runs over and kills a child in his carriage and rides away after flinging a coin at the grieving father.

These injustices are later met with some revenge, but it is a theme that runs throughout the entire story.