In the past, different civilizations have been governed by different forms of government. The United States Democratic Republic, the Roman Republic, and the Athenian Democracy have similar and different functions in how they run their government. In the Democratic Republic of the United States, it comprises the three branches of government, namely the legislative branch, the executive branch and the judicial branch. Their legislative branch has a 100-member Senate and they are elected by the people for a six-year term. The Senates legislate and advise the president on foreign policy. The executive branch has a president elected by the people for four years. The president is the chief executive of the government and commander-in-chief of the military. The Supreme Court has nine judges appointed for life by the president. It is the highest court and hears appeals in civil and criminal matters. A citizen is anyone born in the United States, as well as anyone who goes through a naturalization process established by Congress. Citizens have the right to a speedy and fair trial by jury, to vote in public office elections, to apply for federal employment requiring U.S. citizenship, and the right to run for office. Additionally, they have the freedom to express themselves, the freedom to worship as they wish, and the freedom to pursue “life, liberty, and the pursuit of happiness.” Any citizen who is at least 18 years old and has not been convicted of a crime can vote. An ordinary citizen can vote to choose representatives who will run the government. The U.S. Constitution is the fundamental law of the United States. The Constitution's laws spoke of the freedom to pursue "life, liberty, and the pursuit of happiness", that all men are equal, and laws against...... middle of paper .... ..y, and the Roman Republic has the same three branches of government. All three governments have an executive branch that makes and enforces laws for the people, they have a popular vote goal, and they have people who can vote. While this may be true, the three governments have different policies. qualities required to be a citizen. The characteristics of the American government are using all three branches of government, having a commander in chief, having a Senate, using written documents on how a government would operate, allowing the people to vote for its leaders and to have voting power. executive power to enforce laws. In short, the United States Democratic Republic, the Roman Republic, and the Athenian Democracy have similar and different functions in how they run their government. The American government uses characteristics of these other cultures.