The world of comedy and comedians of the last five decades, by the man the New York Times calls "a comic institution himself," the only comedian (twenty-six years in stand-up) to have made Elie Wiesel laugh, as well as having appeared on The Tonight Show (140 times, second only to Bob Hope, but who's counting), director of TV comedy series Mad About You, Seinfeld, Friends, Weeds and Curb Your Enthusiasm.From David Steinberg, a rabbi's son from Winnipeg, Canada, who at age fif