How is citizenship determined in most countries?

In most countries, citizenship is primarily determined by two principles: jus soli (right of the soil) and jus sanguinis (right of blood). Jus soli grants citizenship to individuals born within a country's territory, while jus sanguinis allows citizenship to be inherited from one's parents, regardless of birthplace. Additionally, many countries have naturalization processes for foreign nationals to acquire citizenship through residency, language proficiency, and other criteria. Each country's laws and regulations can vary significantly regarding these principles.