Territorial integrity has in the past decades been facing tremendous challenges. Self-determination claims have dramatically increased and led very often to civil wars. Some states have even been disintegrated. External interventions have put severe stress on territorial sovereignty. Old doctrines such as humanitarian intervention have been revived by some global and regional powers in order to achieve their own political goals. Last but not least, globalization has weakened the states to the extent that some have started to lose their congruence with their own nations, which has in fact led to the emergence of ethnonationalism and the radicalization of nationalistic movements claiming purely and simply their own independence. In all these situations, International Law has not been of great help to the states in order to meet these challenges. It was so because International Law does not provide for any particular protection to territorial integrity, although the latter is a cornerstone of that law.