America in the 20th Century (1913-1999)

The United States'' boundaries have expanded over the centuries—and at the same time, Americans'' ideas about their country have grown as well. The nation the world knows today was shaped by centuries of thinkers and events. Today, the United States of America is the lone super power in the world. The United States is very strong. Power, however, is not the only thing that comes with being a world...