An important Roman contribution to American government is the idea of a "republic" or the creation of a representative democracy. In the Roman Republic, representatives were elected by the people to govern on their behalf in the Senate, similar principles were used in structuring the American system of government.
Wider margins are your friend. They reduce the length of each individual line of text, making your writing easier for your readers' eyes to scan. And they create mental 'breathing space'* that makes the whole document more pleasant to read.
Government is a body of highly qualified people that run a large body of people.