What are the motifs in Chapterhouse: Dune by Frank Herbert?

Politics is a recurring idea in the story. Having gone lightly on his favorite subject of politics in recent Dune novels, Frank Herbert returns to it with gusto in Chapterhouse: Dune. He finds an opportunity for a long disquisition when the Reverend Mother Lucilla is imprisoned on Juncture and questioned by the Grand Honored Matre Dama about a variety of subjects. When the Grand Honored Matre asks if the witches (Bene Gesserit) practice democracy, Lucilla affirms they do, but points out they stay especially alert to democracy's tendency to parade scapegoats and to create bureaucracies that convince people it does not matter if they vote.