Stephen Schwartz's 1978 musical based on Stud Terkel's 1974 collection of interviews (subtitled People Talk About What They Do All Day and How They Feel About What They Do) has a subject that will be timely as long humans as walk the Earth. In the midst of our current "spirited political discussions" regarding labor unions and the rights of the working classes, a celebration of everyday people talking about their work lives couldn't be more relevant. Indeed, on opening night a monologue speech by an actor playing a community organizer drew cheers from the audience. Beyond its timeliness, though, Working remains a moving piece of musical theater, with one of the best scores (composed by Schwartz and six other songwriters) of the latter 20th century. The case for it as such is made by a stunning Chicago cast and a production team led by director Gordon Greenberg, all of whom, may I say, are very good at their jobs.