In this chapter, Daniel Franchini and Russell Buchan examine the status, nature, content, and scope of the obligation of peaceful dispute settlement. This chapter traces the emergence of this obligation under customary and conventional international law, analyses the conditions that trigger its engagement, and explores what measures disputants must take in order to discharge this obligation. This chapter maintains that the peaceful settlement obligation is an interstitial norm insofar as it influences the interpretation and application of other rules of international law relevant to the peaceful settlement of disputes.

In this chapter, Nigel White assesses the contribution of the UN’s collective security system to the settlement of international disputes. This chapter tests the assumption that impartial law-based dispute settlement by the Security Council is neither achievable because of its political nature nor required by the UN Charter. This chapter analyses the provisions of the Charter and practice of the Security Council in the field of peaceful settlement, looking for evidence of impartiality in both inter-State and intra-State disputes and assessing the influence of peacekeeping mandated by the Council upon impartiality. This analysis shows that the concept of impartiality in peaceful settlement has largely disappeared and asks, in the conclusion, whether it is possible and desirable to (re)turn to impartiality.