The 'Theatre of the Absurd' has become a familiar term to describe a group of radical European playwrights - writers such as Samuel Beckett, Eugène Ionesco, Jean Genet and Harold Pinter - whose dark, funny and humane dramas wrestled profoundly with the meaningless absurdity of the human condition. It is a testament to the power and insight of Martin Esslin's landmark work, originally published in 1961, that its title should enter the English language in the way that it has.