Divergent Series (Veronica Roth) discussion

So I finished the book...
Wow. If this isn't a book that can leave a reader asking billions of questions, I don't know what is. Surprisingly, the whole mystery behind Edith Prior isn't my biggest question. What is blowing my mind and keeps me going on a rant is the fact that all of the factions are pretty much this bubble. If I understand it correctly, Edith created the Faction system so that eventually the Divergent can come out and go outside of the fence and help "their" society", but if that is the case then WHAT THE HECK IS OUTSIDE THE FENCE! WHAT IS THE WORLD REALLY LIKE! They have to get out of that fence, because I might burst if I don't find out how the world is actually like.
That's my biggest question: What is the world really like? What do you guys think about what could be outside the fence, or what society is really like. I feel kind of dooped because Veronica Roth forced me into being a part of the faction bubble too and I don't know what''s going on outside. And being my curious self, I WANT TO KNOW. *sigh* Curiosity killed the cat.

I was sad to find that I kind of expected it. Nobody spoiled it for me. But I am just really good at guessing stuff.
Considering how modern everything is in there I am curious as well how Roth will make the outside world. I also wonder how much time has passed. I guess we'll have to wait and see!