Present and future challenges in the new post-Westphalia order

The present article represents an exercise that aims to outline the main features of post-Westphalia international order, in terms of polarity of power, in an attempt to identify possible challenges regarding the stability of international system. In this respect, a special attention has been given to U.S.A position, the current world leader, and to those two actors commonly referred to when looking for the main opponents of American leadership - China and Russia. The last part identifies the main sources of insecurity that are affecting and will continue to affect the stability of the international system.