Statelessness
Statelessness is an international problem in which an individual has no formal or protective relationship with any state. This might occur, for example, if a person's parents are nationals of separate countries, and the mother's country rejects all offspring of mothers married to foreign fathers, but the father's country rejects all offspring born to foreign mothers. Although this person may have an emotional national identity, he may not legally be the national of any state.
Read more about this topic: Nationality