Threat does not inherently matter unless it is perceived, and, on the other hand, anything that is perceived as threat matters, whether or not the threat rings true. North Korean Foreign Policy: Security Dilemma and Succession, by Yongho Kim, posits security dilemma and political succession as the two main factors that North Korea perceives as threat, and that these external and domestic threats constitute Pyongyang's provocative foreign policy. North Korean Foreign Policy suggests that an effective policy for countries relating to North Korea, whether dovish or hawkish, should deal directly with Kim Jong-il's political survival, and not with Pyongyang's failed economy.