Human nature

There is a question I would like to answer. This question is "does human nature come from who you are or what you do? This is an interesting question because there is no true answer. The only answers to this question are opinions, and opinions are not facts. My opinion is Human nature comes from a little bit of both who you are and what you do. Just like through out history different races got there own human stereo types. These stereo types came from both whom there where and how they acted in humanity. It still happens to this day. Stereo types from years and years ago are still used by people that are so called racist. Although there are arguments that human nature comes from one or the other I feel they are wrong and am willing to back up my opinion. Please comment and tell me your opinion on the subject.