It really depends on which era, if the question asks about the Roman Republic, then it would be a republican government. In Ancient Rome, an aristocracy was used. In the Roman Empire, the emperor was the main man, but he also had a senate.
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They believe that governments should meddle into things like economy to improve the lifestyle of others. Socialists usually claim that it is necessary for a government to intervene and deal with businesses and the economy because that ensures that there's equal rights for all people and people are protected from exploitation and monopolies and similar things.
King George was outraged by this so he shut down the boston harbor until all of the tea was paid for.
The U.S. Constitution is based on several principles of American democracy. Yes, it is reflected because the amendments list the powers given to the individual people.