When I look http://en.wikipedia.org/wiki/American_Dream .It said that the motion of American Dream , and the American Dream is rooted in the Decraration of Independence.
the theme of Amerocan Dream is having a better,richer,and happier life. Then http://www.americansc.org.uk/online/American_Dream.htm. And it illustetes the conpetions of American dream and the way to achieve the Dream.,and http://memory.loc.gov/learn/lessons197/dream/the%20dream.html . It is showed us the source of American Dream and explain what is the American Dream.
_ In my pinion, I think American Dream is every Americans' life and dream. They probably have same goal and it has special meaning that can encourage every people do best for themselves. That is why the American Dream is vital for everybody.
