Summary and Keywords
The evolution of international organizations (IOs) can be divided into three phrases. The first phase started with the Congress of Vienna (1814–15), which set in motion a series of innovations, inventions, and learning processes, shaping the core of what we now call IOs. The second phase of international organization in the nineteenth century is characterized by the building of permanent institutions. This is reflected in the new and dominant term “union” for organization. The term “public international union” (PIU) became the overarching term for the by intergovernmental organizations (IGOs) of the late nineteenth and early twentieth centuries. PIUs have been regarded as “early IGOs” which later transformed into specialized agencies of the UN system, with their subdivisions as institutional prototypes for the League of Nations and the UN. The third phase of international organization is the continued existence of IOs during the first half of the twentieth century. The outbreak of World War I can be regarded as an exogenous shock to the evolutionary development of IOs. During the war, the concept of international organization was not lost and was even central to the thinking on international politics in the UK and the US. Detailed plans for an international peace organization, using the term “international government”, were produced and discussed by politicians and citizens. These plans, which became part of the institutional strategy devised by the US, strongly reflected the organizational experiences of the PIUs.
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