The study of the rights and duties of citizens is called

civics

Explanation:

The study of the rights, duties, and responsibility of citizens. Citizensowe their loyalty to the government and are entitled to protection from it.

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.

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