‘What makes one sentence into a line of poetry and another sentence dull and lifeless?’ This was one of the questions Arnold Wesker set out to answer from the point-of-view of the practising playwright rather than the critical theorist, when he delivered the following pape; to the biennial conference of the International Association of Theatre Critics in Rome in 1985. He examines the constituent elements of stage dialogue in supposdly ‘raistic’ drama and th rigorous if not always conscious process of artistic selection and shaping diotated, in his own practice, by the natur of the originating experence. He illustrates his argument with extracts from his own works. including his most recently staged play in London, Annie Wobbler – the first in a now-completed cycle of four plays for on woman of which Four Portraits, Yardsal, and Whatever Happened to Betty Lemon? are the other parts. A frequent contributor to the original series of Theatre Quarterly, Arnold Wesker's earliest works, the plays of the ‘Wesker Trilogy’ and The kitchen, were milestones in the creatior of the ‘now British drama’ of the late fifties, and he has continuec to write for the theatre in a wide range of styles – which have been known to disturb the ‘expectations of realism’ of some of the critics he was here addressing…