Final answer:
Sovereignty is the power of a nation-state to determine its government and make laws without external interference. It is an essential characteristic of nation-states.
Step-by-step explanation:
The power of a nation-state to determine its government and make laws is called sovereignty. Sovereignty refers to the supreme authority of a state to govern itself and its territory without interference from external forces. It is an essential characteristic of nation-states and allows them to exercise control over their own internal affairs.
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