its starts of by the author having a good reputation in his/her books adn a lot of money to publish them.
They are so powerful because US is such a powerful country.
by joining forces with other powerful city-states
By trading with India.
Because of TRADING
by conquering other lands
Because they just MAJICLY DID . OKAY
they took steroids
Really not sure i am looking for the same answer :)
He is the President of a very powerful country.
Some became powerful from finding metal Ore and started making weapons.
separation of powers
after overthrowing the hyksos