How has citizenship varied among nations and over time?

While there is disagreement about when the relation of citizenship began, many thinkers point to the early city-states of ancient Greece, possibly as a reaction to the fear of slavery, although others see it as primarily a modern phenomenon dating back only a few hundred years. In Roman times, citizenship began to take on more of the character of a relationship based on law, with less political participation than in ancient Greece but a widening sphere of who was considered to be a citizen. In the Middle Ages in Europe, citizenship was primarily identified with commercial and secular life in the growing cities, and it came to be seen as membership in emerging nation-states. In modern democracies, citizenship has contrasting senses, including a liberal-individualist view emphasizing needs and entitlements and legal protections for essentially passive political beings, and a civic-republican view emphasizing political participation and seeing citizenship as an active relation with specific privileges and obligations.

While citizenship has varied considerably throughout history, there are some common elements of citizenship over time. Citizenship bonds extend beyond basic kinship ties to unite people of different genetic backgrounds, that is, citizenship is more than a clan or extended kinship network. It generally describes the relation between a person and an overall political entity such as a city-state or nation and signifies membership in that body. It is often based on, or a function of, some form of military service or expectation of future military service. It is generally characterized by some form of political participation, although the extent of such participation can vary considerably from minimal duties such as voting to active service in government. And citizenship, throughout history, has often been seen as an ideal state, closely allied with freedom, an important status with legal aspects including rights, and it has sometimes been seen as a bundle of rights or a right to have rights.[3] Last, citizenship almost always has had an element of exclusion, in the sense that citizenship derives meaning, in part, by excluding non-citizens from basic rights and privileges.

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