What playwright is the voice of this generation?
Hey, there's Lena Dunham on the cover of the new Rolling Stone. And there she is filling backpacks with awards for creating and starring in "Girls," the habit-forming HBO series about 20-somethings enjoying/enduring rootless jobs and unglamorous sex in the city next door to the city, Brooklyn. And, look, there are the articles with a cyberspaceful of arguments about whether Dunham, 26, is, or is not, or just might be…