The methods of effective support of international peace and security directly depend on the features of the global and regional security environment. The nature of current challenges and threats determines the format and directions of international security cooperation. Faced with the modern challenges and threats of the globalized world, no state is able to ensure its own security solely by its own efforts, without relying on the help of the international community and collective security structures. Each country independently determines the degree of its participation in certain international events in the field of international security. In this vein, various forms of international cooperation and cooperation in the field of security are formed in accordance with countries’ perceptions of common threats and their own national interests. In the conditions of the current level of globalization, international cooperation covers almost all spheres of social activity and requires the establishment of generally accepted and understandable “rules of the game” and certain regulation at the supranational level. These functions are assigned to international institutions and the system of international treaties. The transition to the information society, the processes of globalization, the development of the latest technologies and the new challenges of modernity have led to the emergence of new ways of waging war and have radically changed the international security system. The principles, resources and means of warfare have changed significantly. Modern challenges and threats to the global security system have led to a rethinking of the conceptual and practical foundations of international security cooperation. In order to maintain security and stability in the modern world, uniform rules, principles and standards of responsibility must be adopted. The UN acts as a universal and unique platform for consolidating positive trends in the development of the international security system.