In this chapter, we assess the links between the peaceful borders of the Southern African countries and the occurrence and proliferation of illicit transnational flows. Peace broke out in Southern Africa following the end of the regional and civil wars involving South Africa and its neighbors, and especially the domestic peaceful change that took place in South Africa in 1994, ending the apartheid regime and leading to the normalization of relations between South Africa and its neighbors. The threat of interstate warfare and violence in the SADC region has receded in the last twenty years, as the region has experienced a significant transition from war to stable peace. At the same time, in the aftermath of peace and integration, open and porous peaceful borders among the Southern African countries have enabled the occurrence and proliferation of both licit and illicit flows.