I'm Portuguese, I can get the themes about the American Dream and American values but, there are some universal themes there, about love and greed and wanting to feel relevant, these feelings are common to everyone but they take on different shapes in different cultures.

Btw it's one of the few cases I thought the movie was better than the book. I bought the book in a rush because I was going to watch the movie and I wanted to read the book first, I thought the book was ok but the movie is a work of art.