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Citizenship is the status of a person recognized under the custom or law as being a member of a state. A person may have multiple citizenships and a person who does not have citizenship of any state is said to be stateless. Other words used to describe statelessness are countryless or exile. Nationality is often used as a synonym for citizenship in English – notably in international law – although the term is sometimes understood as denoting a person's membership of a nation (a large ethnic group). In some countries, e.g. the United States, the United Kingdom, ''nationality'' and ''citizenship'' can have different meanings (for more information, see Nationality#Nationality versus citizenship). ==Determining factors== A person can be a citizen for several reasons. Usually citizenship of the place of birth is automatic; in other cases an application may be required. Each country has their own policies and regulations which change the criteria of who is issued citizenship. * Parents are citizens (''jus sanguinis''). If one or both of a person's parents are citizens of a given state, then the person may have the right to be a citizen of that state as well. Formerly this might only have applied through the paternal line, but sex equality became common since the late twentieth century. Citizenship is granted based on ancestry or ethnicity, and is related to the concept of a nation state common in China. Where ''jus sanguinis'' holds, a person born outside a country, one or both of whose parents are citizens of the country, is also a citizen. States normally limit the right to citizenship by descent to a certain number of generations born outside the state. This form of citizenship is not common in civil law countries. * Born within a country (''jus soli''). Some people are automatically citizens of the state in which they are born. This form of citizenship originated in England where those who were born within the realm were subjects of the monarch (a concept pre-dating citizenship), and is common in common law countries. : In many cases both ''jus solis'' and ''jus sanguinis'' hold; citizenship either by place or parentage (or of course both). * Marriage to a citizen (''jure matrimonii''). Many countries fast-track naturalization based on the marriage of a person to a citizen. Countries which are destinations for such immigration often have regulations to try to detect sham marriages, where a citizen marries a non-citizen typically for payment, without them having the intention of living as man and wife.〔(UK government Web site: Bishops act to tackle sham marriages - New UK Border Agency approved guidance for clergy should help prevent weddings for visas, 11 April 2011 )〕 * Naturalization. States normally grant citizenship to people who have entered the country legally and been granted permit to stay, or been granted political asylum, and also lived there for a specified period. In some countries, naturalization is subject to conditions which may include passing a test demonstrating reasonable knowledge of the language or way of life of the host country, good conduct (no serious criminal record) and moral character (such as drunkenness, or gambling), vowing allegiance to their new state or its ruler and renouncing their prior citizenship. Some states allow dual citizenship and do not require naturalized citizens to formally renounce any other citizenship. * Excluded categories. In the past there have been exclusions on entitlement to citizenship on grounds such as skin color, ethnicity, sex, and free status (not being a slave). Most of these exclusions no longer apply in most places. Modern examples include some Arab countries which rarely grant citizenship to non-Muslims, e.g. Qatar is known for granting citizenship to foreign athletes, but they all have to profess the Islamic faith in order to receive citizenship. The United States grants citizenship to those born as a result of reproductive technologies, and internationally adopted children born after Feb 27, 1983. Some exclusions still persist for internationally adopted children born before Feb 27, 1983 even though their parents meet citizenship criteria. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「citizenship」の詳細全文を読む スポンサード リンク
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