The Korean Peninsula was the battlefield of the Cold War in the 20th century. The Korean Peninsula suffered from the division of the two Koreas and the Korean War of fratricidal war. Therefore, it is very dramatic that the opportunity to ease military tensions on the Korean Peninsula and peaceful inter-Korean exchanges has arrived since 2018. The Heavenly Parents' Holy Community has been carrying out the peace and unification movement for half a century, emphasizing the Korean Peninsula as the fatherland of God. The unification movement of the Heavenly Parents' Holy Community is an example of the civilian responsibility and role in realizing the peace community on the Korean Peninsula. Peaceful unification of the Korean Peninsula cannot be achieved by government-level diplomacy alone. When political negotiations between the North and South Korea face difficulties, dialogue and cooperation at various levels, including religion, society, economy, and culture, can play an important role. In particular, the Heavenly Parents' Holy Community has carried out all-out dialogue and cooperation campaigns, including economic, cultural arts, sports, denuclearization, unification preparation, international unification movement, blessing and true family movements, inter-Korean exchanges. It has contributed greatly to substantial inter-Korean exchanges by establishing an international foundation and engaging in public education. In the future, peaceful unification of the Korean Peninsula will be realized when not only the efforts of political summit diplomacy, but also the joint deliberation, cooperation, and progression on a multilateral level like the model of Heavenly Parents’ Holy Community such as religion and civic groups.