Criminal Diplomacy Without Sovereignty: The Afro-Eurasia Criminal Networks and the Implications on International Security

International relations scholarship remains strongly oriented towards states, even though transnational criminal organisations increasingly shape cross-border security, political economies, and forms of governance. This article argues that transnational criminal groups develop cooperation strategies that are functionally analogous to interstate relations. They bargain, exchange information, allocate jurisdictional responsibilities, outsource activities, signal credibility, manage conflict, and exploit territorial and legal differences. The analogy is strategic and relational rather than legal: criminal groups possess neither sovereign equality nor legitimate authority. The argument is developed through a structured comparative synthesis of recent peer-reviewed research on Nigerian confraternities and cyber-fraud networks, East African–Southeast Asian wildlife-trafficking networks, Chinese organised crime, European drug-market cooperation, and the Sinaloa cartel. The evidence indicates that criminal cooperation is not normally a permanent alliance between unitary organisations. It is selective, task-specific, socially embedded, geographically clustered, and often mediated by brokers, diasporic networks, legitimate businesses, and corrupt officials. Digital finance can increase the speed and reach of these relationships, but cryptocurrency is an enabling infrastructure rather than a sufficient explanation for transnational corruption. The article contributes to international relations theory, criminal governance research, and international policing by proposing the concept of criminal diplomacy. It recommends relational network analysis, transgovernmental investigative teams, financial-intelligence cooperation, anti-corruption safeguards and rights-sensitive policing that targets brokers and infrastructures rather than relying exclusively on “kingpin” arrests.