I would say I internalized the value of "treat others the way you want to be treated." I'm very compassionate, and try to be positive and kind in various situations. I try my best not to be rude, even if I'm in a bad mood. I detest rude people, and I make sure that terrible quality is not a part of who I am.
One example of a social value that I have internalized would be the value that all people should be treated equally regardless of the color of their skin.
I was born in Mississippi, a state whose treatment of minorities is rather infamous. My parents both were both attending the University of Mississippi when the first African American student enrolled at that university, an event which caused a riot on the campus.
Despite the social environment in which I was born, my parents instilled in me the belief that no matter the color of a person's skin, all people were essentially the same.
I continue to hold that value today, even more firmly than ever, and I hope to instill that same value in my children.