Help Plzzz Why are nation-states difficult to define? explain.

There is no such thing as a perfect nation-stated.

Explanation:

Because the territory occupied by occupied by a particular ethnicity never corresponds precisely to the boundaries of countries: ... Each ethnic group recognizes and respects the distinctive traditions of other ethnicities.

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architecture i think.

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necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.