In basic terms, civilization is dependent upon the spontaneity and fulfillment of the individual. Your civilization is in sad straits. Not because you are allowed spontaneity or fulfillment to individuals, but because you are denied it, and because your institutions are based upon that premise.
The American Dream means being part of a society that allows you to be or do whatever you want, and to have a sense that your individual optimism and hard work will be rewarded. It exists outside of the U. S. as well as inside. People continue to come here because they want to improve their lives, they want to be able to support themselves and they want to live in freedom. A lot of people who criticize this country still send their children here to study.