Reminded me of the rigid liberal versus conservative political atmosphere surrounding the most recent election. There's a lot that can go wrong when you can't see the shades of grey. (No, not that shades of grey, silly.) 
 The realist in me sees apocalyptic fiction as a very likely possibility, which is probably why I squirmed from start to finish. If I were to take the "which faction are you" quiz, I'd be abnegation or amity, for sure. Dauntless would scare the living daylights out of me. 
 Other Things I Liked: Strong female protagonist. Thematic connection between bravery and selflessness. Descriptions of post-apocalypse Chicago. (Hey, I've been to Navy Pier!). 
 P.S. My vocabulary is completely lacking, as I kept having to be reminded what candor, amity, abnegation, dauntless and erudite meant. Good thing this was written for teens. 
 Favorite Quotes 
 Decades ago, our ancestors realized that it is not political ideology, religious belief, race, or nationalism that is to blame for a warring world. Rather, they determined that it was the fault of human personality - of humankind's inclination toward evil, in whatever form that is. 
 There's nothing especially brave about wandering dark streets with no flashlight, but we are not supposed to need help, even from light. We are supposed to be capable of anything.