Which term describes a political institution that rules over a group of people with the same language and culture who reside within a defined territory?

A group of people with the same language and culture who reside within a defined territory is a homogeneous society. A political institution that rules over it is a homogeneous societal government.

the supreme court plays a big role in government. the constitution gives them ability to check the president and the congresses actions and dictate if their actions are allowed by the constitution or not.

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