The codes geass why is laws
200 nations geass users or more.
The basic story of suffering and over comes suffering of main character and geass user the changing and conflicts of nations based of history and experience expansion of lands to become bigger and more powerful, became federation or United state of 200 nations, and the struggle to transform from monarchs to republics, and love and hatred to
Using geass on the world for personal ideologies , revenge or peace and orders and struggles of nations become super powers or torn apart by superpowers.
Including Times traveling to change the world, and knowing geass powers.
The details control over world settings technology settings historical settings and humans settings include wars and sickness, To create a world believe able based on real world history.
Any nation will do because equality, the equality in possibilities to become better more powerful in peace and possibilities wars gained.