An alien could become a legal member of a state by

An alien can become a legal member of a state by going through a process known as naturalization. Naturalization is the legal process by which a non-citizen becomes a citizen of a particular country. This process typically involves meeting certain requirements, such as living in the country for a specified period of time, passing a language and/or civics test, and demonstrating a commitment to the values and principles of the country. Once an alien has successfully completed the naturalization process, they are granted the same rights and privileges as native-born citizens, including the right to vote and hold public office. However, naturalization is not the only way for an alien to become a legal member of a state. Depending on the laws of the country in question, aliens may also be able to become legal members through migration, employment, socialization, or conversion to the predominant religion of the state.