Recently, I have read chapters 28-31 of the book Divergent. Tris had gone to Erudite headquarters to talk to her brother Caleb. Caleb seemed nervous and made it seem hard to speak to Tris. After that Jeanine had a big talk with Tris and seemed like she was trying to do something to Tris. Eric was waiting for Tris when she came back, he started yelling like he was mad because he was. Tobias had come in and he took Tris away from Eric. Tris and Tobias went over to the Erudite headquarters and they talked alone. Tobias was suspicious that Erudite were planning war on Abnegation and they would be using Dauntless to help them.
I wonder why Erudite and Abnegation don't get along. They're in the same city, so why not?