This paper examines different foreign policies of the Republic of Korea (South Korea) towards the Democratic People’s Republic of Korea (North Korea) with regards to a peaceful reunification of the Korean Peninsula. The paper uses the theoretical framework of Social Constructivism to analyze what impact the different foreign policies of South Korea towards North Korea have had on their relations, thus providing an understanding of what impact those foreign policies have had on the peaceful reunification process of the Korean Peninsula. The paper will also look at the First Korean Nuclear Crisis, the Second Korean Nuclear Crisis, the ROKS Cheonan sinking and the shelling of Yeonpyeong, and with the help from the theoretical framework of Social Constructivism, analyze what impact those incidents have had on South Korea’s foreign policy and relations with North Korea, thus providing an understanding what impact those incidents have had on the peaceful reunification process of the Korean Peninsula.