Class instability is the driving circumstance in The Cherry Orchard. Chekhov portrays Russia after in the freeing of the serfs, in a moment of flux. While the society used to be well-stratified, now everything's all mixed up. There are servants who want to stay servants, like 87-year-old Fiers. There are servants who pretend to be ladies and gentlemen, like Dunyasha and Yasha. There are former peasants who are rich and getting richer, like Lopakhin. And the aristocrats on their way nowhere but down.
As Lubov's servants, Fiers and Yasha embody the change in social attitudes in turn-of-century Russia.
Trofimov's monologues make explicit the ideas of social change embedded in the play.