War, the use of force, is often thought of as the ultimate tool of international relations. A widely accepted definition is that given by Clausewitz, with war being "the continuation of politics by other means". There is a growing study into 'new wars' involving actors other than states. The study of war in International Relations is covered by the disciplines of 'War Studies' and 'Strategic studies'.
The mobilization of international sham. This is attempting to alter states' actions through 'naming and shaming' at the international level. This is mostly done by the large human rights NGOs such as Amnesty International (for instance when it called Guantanamo Bay a "Gulag"), or Human Rights Watch.
The allotment of economic and/or diplomatic benefits.