A major challenge for countries that emerge from civil war is the stabilization of the post-conflict order in a way that fighting does not break out again. Recent empirical and theoretical work on the resolution of civil wars and on the duration of peace strongly rely on the bargaining framework of war emphasizing information asymmetries and commitment problems as main reasons for why in some states civil wars recur repeatedly, whereas in other societies a conflict ends and a transition to a peaceful society is successful. The length of peace spells depends partly on information about the distribution of power that became available during the conflict, captured by the duration and intensity of the fighting as well as the type of conflict ending. Information problems are more relevant at earlier stages and with regard to the initiation of negotiations. In finding bargaining deals and securing their implementation, the conflict parties have to overcome commitment problems. The literature has investigated in more detail third-party security guarantees and power-sharing arrangements as mechanisms to get conflict parties to credibly commit to and adhere to a negotiated agreement. Recently, empirical research moved beyond the conclusion of peace agreements to the study of their implementation. Particular challenges for a peaceful order are the demobilization of ex-combatants, which is aggravated by time-inconsistency problems, the timing of elections, and the redistribution of economic resources. Finally, solutions become more difficult in multiparty conflicts and if the armed groups are fragmented.