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In the modern context then, a system dominated by states, we can reasonably regard diplomacy as something being conducted for the most part between states. In fact, the applicable international law that governs diplomacy – the Vienna Convention on Diplomatic Relations (1961) – only references states as diplomatic actors. Yet, the modern international system also involves powerful actors that are not states. These tend to be international non-governmental organisations (INGOs) and international governmental organisations (IGOs).
