Article in English: Many people in the international community see international and municipal law as two separate entities. These people would say each system regulates separate subject matters and each exists in its own sphere. They would say international law regulates the conduct of states and their interactions with one another. On the other hand, they would say municipal law regulates the conduct of people within a sovereign state. If you are a dualist, you would likely say the two barely interact at all. However, if they do, it would usually be when municipal law is recognizing and incorporating the rules of international law. Therefore, the national law would have supremacy over the international law. In case of conflict between international and municipal law, a national court would apply municipal law. Monists believe international law and municipal law are all part of one legal system. To them, both laws are based on the same premise, which is regulating the conduct of people and things. If you are a monist, international law will trump municipal law, even in national courts. While nations are under a general obligation to follow international law, there is usually a great amount of leeway in how they choose to do so. Nations are generally free to decide how they incorporate international law into municipal law. While different nations handle this issue in different manners, the prevailing position seems to be dualist. Therefore, most nations require the formal integration of international law through the passage of some municipal law. In the international sphere, international law wins out over municipal law. However, municipal law is useful evidence of international customary law and general principles of law. In addition, international law often leaves questions to be answered by a nation's own laws. Therefore, if you found yourself in international court, you might use municipal law to help you decide whether there has been a breach of international law. An international court may even look to municipal law to...

Summary in Vietnamese:
Phân tích mối quan hệ trên quan điểm của thuyết "dị nguyên". Phân tích mối quan hệ trên quan điểm của thuyết "nhất nguyên". Các quốc gia phải tuân thủ luật quốc tế ở mức độ nào? Đánh giá tác động của luật quốc tế đối với luật quốc gia.