Scenario: List of dominant countries

There's a list of top-dominant (economically and politically speaking) countries in the World (or in the Western World earlier) by period of the human history.


 * Roman Empire (c. 50 BC - c. 700)
 * Most nations of Europe such as England, France and Spain (c. 700 - c. 1800)
 * England (c. 1800 - 1945)
 * United States and Soviet Union (c. 1920s to 1945 - 1985)
 * United States (1985 - c. 2030s)
 * China (c. 2030s - 2120s)
 * Most of Arab nations (2120s - 2400s)
 * No nations, anarchy (2400s -)