During the past decades sovereignty has demonstrated to be a puzzling establishment at the same time altering and persistent Currently it is of significant curiosity to academics of International Relations and is the topic of considerable discussion This essay assesses how the orthodox models of sovereignty have been contested in the post Cold War era with the growth of several nations with variable internal structures together with the development of recent menaces to the international order This essay divides the discussion into four parts the first examines the concept of sovereignty that originated from the Peace of Westphalia 1648 the second part observes the geo political structure right after the end of the Cold War thus the birth of interdependence sovereignty established in a unipolar world order where nations step from an internal to an external sovereignty and the curious reactions of the United Nations UN to this order The third segment s main focus is on humanitarian intervention with the example of NATO's involvement in Kosovo in 1999 which can be described as the shift that took over the concept of national sovereign from realist to a rising ethical view with the support of a global civil society movement