One the faction is amity they are the peaceful they are the farmers,another one is abnegation they help the homeless, or like the movie says the factionless. The Erudite are the smartest one and they just do the scientistic and the technology, the candor they always says the truth and they are the judge, and the dauntless the are the brave ones, they are like the police or army. This faction are created to make the peace in the city where they lived and all of them can choose the faction where they think were they belongs. The segregation are made for people live in peace with each other and just do the thing what they're faction do, so every faction live by the self and the faction you are that’s where you would lived and you would do the same that all others do in the fraction of what they do.
Also in the movie Dyvergent you can find desolation; the movie shows the world where they lived now destroyed.In my opinion i think that in the future an event like WWIII will happen and almost everything will be destroyed. I think that would happen because people start to lose themselves and may be because they didn’t control the pollution in the earth. People start to lose their faith and the respect that they supposed to have each other and maybe people start get angry and that’s they when to War and the world that they live now that maybe was