Yet, it should be underlined that political communities, however they may have been organised, have usually found ways to communicate during peacetime, and have established a wide range of practices for doing so. The benefits are clear when you consider that diplomacy can promote exchanges that enhance trade, culture, wealth and knowledge. Diplomacy is not foreign policy and must be distinguished from it. It may be helpful to perceive diplomacy as part of foreign policy. When a nation-state makes foreign policy it does so for its own national interests.
