During the intervening years, Alabama was the site of some of the most defining events of the civil rights era. These events transformed the state and profoundly changed America. Black protest started long before the civil rights movement emerged and continued long after it stopped receiving front-page headlines.
Also, you can play versus(and survival, if you get the GOTY edition) offline by selecting join friends, the pressing X to start your own lobby, it tricks the game into letting you play the modes. Why there wasn't just an offline option on the main menu is beyond me.
Though I hear some missions and such REQUIRE more players. Rockstar has said there will be solo missons though. Edit: Though if you're trying to ask if you can somehow play it offline by yourself that answer is NO. Your online character is only accessed by going Online. Offline you can play with the 3 main characters.