With textual evidence What is the theme of the book the outsiders by S. E. Hinton?

The theme of the story was to show the life of a boy that was different. He and his brothers were not he same nor liked the same things. A boy who was a greaser and had a better heart than any soc. He had friends that he cared about and they cared for him. A boy that risk his life foe people he doesn't even know. A Poem loving boy who lives in poverty and still lives like a soc wish they could. With a good heart and with love