Since the end of the Cold War, the scope and study of diplomacy has expanded. In the modern diplomatic environment, novel terms such as pipeline diplomacy, coercive diplomacy, diplomacy by sanction and citizen diplomacy are common, alongside the more traditional view of diplomacy as state-to-state activity, monopolized by professional, official diplomats. With such a broad range of views, the scholar can become confused as to what actually constitutes modern diplomacy? In this article, it is argued that the disparity of views in the diplomacy studies field must be classified and consolidated before the enhanced role of diplomacy in the twenty-first century can be better understood. In this article, three different classifications or schools of diplomatic thought are introduced and constructed: the Traditional School, the Nascent School, and the Innovative School.