The Barber of Seville celebrates youth, love and the possibility of happiness. In the succeeding works, both form and content become richer and somewhat darker. The Marriage of Figaro is also a boisterous comedy, but more serious problems complicate the lives of the characters. By the time of The Guilty Mother, a drame, Figaro, Suzanne, and the Almavivas have left exotic Spain for revolutionary Paris, and evil threatens to engulf them. Social structures, the family, and the moral responsibility of the individual are major themes in the trilogy.