This left the United States as the world's undisputed naval superpower. This brought about unipolarity with the U.S. unchallenged as the world's dominant superpower. He regards his nation as a knowledge superpower and developed nation. Ellone eventually escapes to Esthar, the world's technological superpower. Italy is considered the birthplace of Western civilization and a cultural superpower. The United States was left as the world's only superpower. The United States of America remains the only global superpower. The United States emerged from as a global superpower. Russia raised itself from an economically backward country to that of a superpower. Fear of further escalation and superpower involvement brought the war to a conclusion. Outer Heaven plans to use Metal Gear to impose itself as the new world superpower. It emerged as a superpower in the post-war period. Russia is considered an "energy superpower". Soon, the Sith become a second superpower. The United States especially emerged as a "superpower".