Questions+of+Periodization

Are there continuities and breaks between the chronological periods?
 * Continuities
 * **Changes**
 * **Rise of the United States:**
 * After World War One, the U.S. became very economically strong (until the great depression.)
 * After World War Two, the U.S., along with the USSR, were the two "Superpowers" (economic, political)
 * Globalization of American culture: Because of TV and movies, American culture is everywhere and tends to the dominant culture.
 * **The Soviet Union:**
 * The Soviet Union was created, rose to be a superpower, then it collapsed. This all happened in Unit 5.