Here are six plays that stand as landmarks of the modern drama:Chekhov’s THREE SISTERS repeats, in terms of a handful of people, the spasms of a dying society.Isben’s THE MASTER BUILDER is the tragedy of the modern romantic, caught between desire and reality.Shaw’s MRS. WARREN’S PROFESSION shocked England and America; this play was the first honest attempt in our era to deal with prostitution. O’Casey’s RED ROSES FOR ME is about a Protestant worker of Dublin who is a symbol o