The United States established the Supreme Court, to resolve disputes over conflicting laws or controversial cases. Modern political ideas in the concept of "citizen" and the legal right of citizens are derived from In ancient Greece, everyone has laws for citizens to protect their rights and also have limits on the limited rights of non-citizens, laws such as laws on immigration. The modern concepts of democracy and supervision system also derive from the ancient Greek one, they all obey the principle of participation of the greatest possible number of citizens, they also use the measurement of voting, lottery and elections, etc. In some modern countries also the part of the leadership selected from among the elites, such as the British parliament; modern democracy control uses laws and separation of powers instead of ancient ostracism. And the latter, the modern political system has also absorbed the separation of powers of ancient republican Rome, to prevent the sovereign