Inter-Korean summit and North Korean-American summit in 2018 brought about great changes in and around the Korean Peninsula. With the breakdown of the second North Korean-American summit in 2019, however, the peninsula has fallen into instability and crisis. The most urgent task for peace on the peninsula is ending the Korean War which began in 1950 and making a peace treaty. The role of religions in South Korea should include helping to mediate to end the Korean War between North Korea and the United States, and helping to facilitate to resume dialogues between South and North Koreas.