Korea is the unique nation, which is divided into two parts, in the world. I think we should unite as soon as possible because there are several reasons. First, our race is unitary, and has for 5000 years history. But North Korea and South Korea have different ideologies and strutures of society. Two countries also have different ways of life and their values. Moreover, they differ from economic, sociologic and cultural quality. However, we had had a single nation, language, history and culture, while we had lived in Korean peninsula for a long period. So, it is natural to combine separated two countries into a single nation. Second, we can achieve the peace of whole Korean peninsula, northeast Asia and also whole wolrd in advance by achieving the unification of Korea. North Korea may bring on war any time, because North Korea and South Korea are in the state of a truce. Therefore, we can contribute to world peace by removing the danger of Korean war in Asia. Third, there are a lot of people more than ten million who are separated with their families or relatives in both South Korea and North Korea. Some of them could meet their separated families in the family reunion campaigns but the number of people who could meet their families in the meetings are small and the meeting time is very short. If two countries are united again, dispersed family members can meet each other, because it is allowed to come and go anywhere. Finally, both countries can get benefits by uniting into a single country because South Korea can utilize buried natural sources in North Korea. And two countries are maybe stronger in the international society. Consquently, we can grow more because we may get economic benefits. If we get all those results, we also will be able to show the successful instance of the country unification to all nations in the world.