Nickname of the United States. Because the United States is a country composed of immigrants from different ethnic groups all over the world. The English spoken by these immigrants is not as class-conscious and geographically diverse as that of the British. They have formed similar living habits and manners; the differences between urban and rural residents are not as obvious as those in other countries. Although American society is highly competitive and racial discrimination exists, it also shows considerable flexibility and inclusiveness in assimilating immigrants from different ethnicities. As a result, an entirely new overall culture and common national consciousness has been formed, making the United States "a country composed of multiple ethnic groups." The American worldview is based on personal striving, self-discipline, and a competitive spirit.