Nationality law is the branch of law concerned with the questions of nationality and citizenship, and how these statuses are acquired, transmitted, or lost. By custom, a state has the right to determine who its nationals and citizens are. Such determinations are usually made by custom, statutory law, or case law (precedent), or some combination. In some cases, determinations of nationality are also governed by public international law—for example, by treaties on statelessness and the European Convention on Nationality.

Broadly speaking, nationality law is based either on jus soli or jus sanguinis, or on a combination of the two. Jus soli (Latin: the law of the soil) is the principle by which a child born within a country's territorial jurisdiction acquires that country's nationality. Jus sanguinis (Latin: the law of the blood) is the principle by which a child acquires the nationality of his or her parents. Today, most if not all countries apply a mixture of these two principles: neither granting citizenship to everyone born within the country's jurisdiction, nor denying citizenship to the children born abroad.

Nationality is membership of a nation or sovereign state, usually determined by their citizenship, but sometimes by ethnicity or place of residence, or based on their sense of national identity.^{[citation needed]}

Citizenship is determined by jus soli, jus sanguinis, or naturalization, which affords the state jurisdiction over the person and affords the person the protection of the state. The word citizenship is often used in a different sense from nationality. The most common distinguishing feature of citizenship is that citizens have the right to participate in the political life of the state, such as by voting or standing for election. The term national can include both citizens and non-citizens.

Nationality can refer to membership in a nation (collective of people sharing a national identity, usually based on ethnic and cultural ties and self-determination) even if that nation has no state, such as the Basques, Kurds, and Tamils. Individuals may also be considered nationals of groups with autonomous status which have ceded some power to a larger government, such as the federally recognized tribes of Native Americans in the United States. Spanish law recognises the autonomous communities of Andalusia, Aragon, Balearic Islands, Canary Islands, Catalonia, Valencia, Galicia and the Basque Country as "nationalities" (nacionalidades), while in Italy, the German speakers of South Tyrol are considered to be Austrian nationals.

Afrika Bambaataa (born April 19, 1957) is an American DJ from the South Bronx, New York who was instrumental in the early development of hip hop throughout the 1980s. Afrika Bambaataa is one of the three originators of break-beat deejaying, and is respectfully known as the "Grandfather" and the Amen Ra of Universal Hip Hop Culture as well as the Father of The Electro Funk Sound. Through his co-opting of the street gang the Black Spades into the music and culture-oriented Universal Zulu Nation, he is responsible for spreading hip hop culture throughout the world. On September 27, 2007, he was nominated for induction into the Rock and Roll Hall of Fame.

Afrika Bambaataa grew up in The Bronx River Projects, with an activist mother and uncle. As a child, he was exposed to the black liberation movement, and witnessed debates between his mother and uncle regarding the conflicting ideologies in the movement. He was exposed to his mother's extensive and eclectic record collection. Gangs in the area became the law in the absence of law, clearing their turf of drug dealers, assisting with community health programs and both fighting and partying to keep members and turf. Bambaataa was a founding member of The Bronx River Projects-area street gang The Savage Seven. Due to the explosive growth of the gang, it later became known as the Black Spades, and Bambaataa quickly rose to the position of warlord. As warlord, it was his job to build ranks and expand the turf of the Black Spades. Bambaataa was not afraid to cross turfs to forge relationships with other gang members, and with other gangs. As a result, the Spades became the biggest gang in the city in terms of both membership and turf.