The debate of is nature or nurture determines human behavior never stop.In my opinion, nature affects like the gene play an important role in human behavior. However, as a matter of fact, the nurture element is most crucial.
For example,if twins raised separately,to another words, make the twins live in different family, different environment. Maybe let one grow up in a Asian city the other grow up in a American city. As a result, they will have different features and different behaviors.
Another example is the wolf boy.
This boy who was raised by wolfs at 4 years old was rescued.He has human gene but he behaves like a little wolf. He forgot how to speak English and his real family.When he feels angry, he will try to bite people. His only way to communicate others is howling like a wolf.
So what can we know from those example? I think nurture is the major affect to influence a person. The environments where the children grow up almost determine their whole lives . The way they behave will be changed a lot. Like the wolf boy. Although he was born in a human beings family, he was caught by wolfs and lived with wolfs for the long time. Thus he likes a wolf as well.
