It has taken nearly three decades, but Naomi Wallace's feverish proletarian dreamscape "Slaughter City" has finally carved its way onto a New York stage"and in doing so, has made a queasily persuasive case for its own urgency. First mounted by the Royal Shakespeare Company (January 1996) and the American Repertory Theatre (March 1996), this bruising, bloodstained fable"set in a slaughterhouse where class war, labor u…
