If this is for an essay, you might want to read about Thomas Hobbes and the state of nature. He makes pretty bold claims about why human beings fight one another. Watch a video on it.
B) It helped to create a common culture in the United States.
Cultural heritage is the legacy of physical artefacts and intangible attributes of a group or society that are inherited from past generations, maintained in the present and bestowed for the benefit of future generations. ... The best way to preserve your cultural heritage, whatever it may be, is to share it with others.