[Aloofi]

but it must be remembered that the World Superpower (Greece, Rome, Mongols, Great Britain, and yes, even the US) needs to 1) build peace, 2) develop others, 3) remain humble.

I don't think any superpower have ever been hummble. I guess is part of the human nature. The moment someone realize that they are "The most powerfull country in the world" the hummility goes down the drain.

Funny thing though, is how all of them believed that they were forever, and how easily the historians came later to explain their fall, and how nobody at their time was able to predict their fall untill it was too obvious and too late.

The study of Hegemons and Superpowers is fascinating.