Escapism and the End of the World as We Know It

Post-apocalyptic literature troubles me.

I should qualify that.  I enjoy a fair share of post-apocalyptic storytelling.  The Road is minimalist and bleak to the point of horrifying beauty.  Nausicaa of the Valley of the Wind is an exceptionally realized far-future fantasy.  Battlestar Galactica takes the most profound kind of end of the world scenario and puts real humans in the midst of it.  Even Star Trek is a post-apocalyptic society, given the events of First Contact.