Section Needed for roots of differences
An important point not brought up in this article is that since the US is a nation of imigrants,  Americans are not ethnically or racially different than their counterparts in the rest of the world. In other words, the differences are created by the temperment and personality differences of  "those who left" verse "those who were left behind". This could help explain stereotypical American traits such as aggression or material indulgence. User:Brando03