Hunger Games: Does society make the person?

I'm sticking with this question because the rest where about love, murder and one was "Is oppression really that bad?" Of coarse it is! Did you read the damn book?

/rant

Anyways, is a person who they are because they where born like that or did the society they live in make them the person they are today? I say Society does in fact, change, if not make the person. If Katness had lived in a fore charitable society she would have never become an archer, or the protective person she was in the book. Peeta Wanted to show them that they didn't own him. That he was his own person but was he really?