What is the theme in The Seagull by Anton Chekhov?

Alienation and Loneliness are themes developed and exploited in much of modern literature is the individual's susceptibility to a sense of isolation and alienation in an environment that is basically inimical to that individual's emotional or mental health. The most important isolated figure in Chekhov's play is Konstantine Treplyov, the uncompromising artist alienated from those around him because they are much too conventional to share his convictions about a need for "new forms."