Since then, serious doubts have been raised about the validity of US overseas intervention and destabilization in Iraq, Libya and Syria.[17][18] As the 21st century progresses, the morality of global policing itself is increasingly in question, with the inevitable loss of self-determination by nations in which intervention occurs.[19] Furthermore, with the advent of non-state threats to global security, prior legal justifications such as general 'laws of war' are of questionable jurisdiction.