Sudan continues to experience armed conflict between non-Arab Darfurian rebels against the predominately Arab Government of Sudan (GoS) supported by its security forces and militias. Despite the international community's thirteen years effort to settle this conflict through negotiations, both sides continue to fight. The factors which have impeded the realization of peace through negotiations in Darfur are the subject of this study. This research used two case studies: the successful Sudan-South Sudan peace negotiations process signed on 9 January 2005 and the failed Sudan-Darfur rebels peace negotiations. Analysis of the two peace negotiation processes reveals factors which contributed to the success and failure of those peace talks. This research identified those factors that have impeded the realization of peace in Darfur as ineffective mediation, an incomprehensive peace agreement, and in genuine power-sharing. Other contributing factors are the unilateral decision by the GoS to conduct a referendum for self-determination of Darfur, unguaranteed security of actors and populations, and mismanagement of spoilers during peace negotiations. This research concludes that the totality of neglect for these factors contributes to the failure of peace negotiations in Darfur and recommends thoughtful consideration of similar conflict resolution processes for a successful, long-lasting political settlement.