This chapter examines the historical evolution of North Korea’s unification policy from its inception in 1945, focusing on the ideological, political, and strategic shifts that have shaped its trajectory. Beginning with Kim Il-sung’s revolutionary rhetoric and military confrontations during the early Cold War, the chapter traces the transition to diplomatic overtures and ideological pragmatism during the détente of the 1970s and the post-Cold War adjustments of the 1990s. Under Kim Jong-il, the policy was marked by militarisation and the prioritisation of regime survival, while the 2000s saw cautious engagement under South Korea’s Sunshine Policy. The chapter also highlights the complexities of Kim Jong-un’s approach in the 2010s, characterised by high-stakes diplomacy such as nuclear brinkmanship and limited economic cooperation. Despite these shifts, North Korea’s unification policy remains deeply influenced, this chapter argues, by its Juche ideology, prioritising regime preservation and independence.