Answer:
the USS monitor won against the CSS Virginia because it was faster.
the CSS Virginia was made from the hull of the sunken USS Merrimack.
A good book on it is called "big bad ironclad" it is a comic book I reccomend it if you want to learn more.
Democracy is efficient in the sense that it allows people to have free will and vote for what they believe is right, Democracy also allows the people to have control, which you will not find dictators.