What makes the United States a nation-state?

please answer asap;)

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Explanation:

The model of the nation state implies that its population constitutes a nation, united by a common descent, a common language and many forms of shared culture. When the implied unity was absent, the nation state often tried to create it. It promoted a uniform national language, through language policy.

the first forms of writing came from them in the form of pictographs around 3100 bc.

it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!