I love the outsiders.
The outsiders is based off of two groups. The greasers and the socs.
The greasers are made fun of, brought shame apon, have no parents, have greased up hair and old raggedy clothing. And have no education.
The socs pick on the greasers because of there traits. The socs are rich, educated, and have style.
The theme is basically divided between the rich and the poor, empathy, honor, identity, and social identity.
These themes drive both sides crazy and set each other of in rage. Fighting each other, killing each other. And also basically surviving and standing strong on what you believe in.
I hope this helps :)