In the sixteenth and seventeenth centuries, a kind of world order was introduced in the west in response to the protracted of political upheaval and wars. The leaders gathered to resolve the problems by creating the concept of political diversities for a peaceful co-existence. In the situations of no superpower was able to win and impose its will on others, they created the principles of sovereignty of the state, legal equality, and non-intervention of others’ affairs.
The system could not prevent the wars from happening. The two world wars broke up. A country that was the most powerful and strong enough to put an end to the war was the U.S. The US represented itself as the world conscience that chosen by God to bring the ultimate system to save the world, the manifest of destiny. America declared that it would not tolerate with any aggressive state that attempted to destroy others. By its political nature, America was created by the people, of the people, and for the people. There was no country that the people have right to choose its leaders and respected their fundamental rights by the leaders.
The United Nations was created to replace the weaknesses of the Westphalian system. The self-determination, collective security, which means attack to one would be considered to attack to all, and international law. The American liberal democracy believes that the world will be peaceful, harmonious, and prosperous only when the world accepts its prescriptions. It would go to fight wherever the people and their rights were abused.