The Importance of Being Earnest, A Trivial Comedy for Serious People is a play by Oscar Wilde. First performed on 14 February 1895 at the St James's Theatre in London, it is a farcical comedy in which the protagonists maintain fictitious personæ to escape burdensome social obligations. Working within the social conventions of late Victorian London, the play's major themes are the triviality with which it treats institutions as serious as marriage, and the resulting satire of Victorian ways.

Wilde's final play again returns to the theme of switched identities: the play's two protagonists engage in "bunburying" (the maintenance of alternative personas in the town and country) which allows them to escape Victorian social mores. Earnest is even lighter in tone than Wilde's earlier comedies. While their characters often rise to serious themes in moments of crisis, Earnest lacks the by-now stock Wildean characters: there is no "woman with a past", the principals are neither villainous nor cunning, simply idle cultivés, and the idealistic young women are not that innocent. Mostly set in drawing rooms and almost completely lacking in action or violence, Earnest lacks the self-conscious decadence found in The Picture of Dorian Gray and Salom

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