The Mob.

The mob has intervened throughout history through violent means.  During the Middle Ages various millenarian sects provoked the mob to engage in violent actions against dissidents.  Perhaps the earliest moment of mob intervention in modern history was the French revolution (constituting the rise of the first period of decline), in which an angry mob provoked by Illuminists under the Duc d'Orleans killed the king.  The Russian revolution resulted in the death of the tsar and the rise of mass communism.  Democracy too constitutes a case of mob rule, in which a levelling process has taken place.  In the recent era, a new form of mob violence exists, both in the form of violent protests and in the rise of cyber-mob violence and a surveillance society.