The evening's themes are not exactly new. That humankind has been consumed in mayhem and folly ever since we started walking upright - and probably even before - is obvious to anybody who's glanced at a history book. Our propensity for destruction has been a source of cackling amusement at least since Aristophanes and the age of classical comedy. But if Mr. Quinn's ideas aren't novel, they're definitely immortal. And this easygoing alumnus of'Saturday Night Live' brings his own distinctive every-guy's perspective to the galumphing march of civilization toward - well, toward whatever it is we are approaching, as Blanche DuBois so lyrically put it.