Back in 1995 Tim LaHaye and Jerry B. Jenkins wrote first of the "Left Behind" books that dealt with the end of the world, but it was made with the Christian approach to the theme. Surprisingly the novels were popular even though they presented rather strong and even risque views.
In a world torn into pieces by war you learn not to trust anyone. But as we have in our nature we always try to find a good thing about other people, but sometimes it leads us on the verge of catastrophe.
Sci-Fi Blog - even though science fiction started before 20th century a lot of people don't realize how vast and rich this genre really is. In United States many people associate sci fi with the Marvel comics and superhero stories, while the core of the science fiction is in the reaching for the future and exploring not only space, but also ourselves.
Post-apocalyptic survival for dummies
Story of the Zone