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IR was born as a discipline
The new discipline had liberal tenets like Sir Norman Angell or Woodrow Wilson -
Start of the institutionalization of IR
Universities, academic journals, professional associations, think tanks -
Birth of IGOs (1920s - 30s)
Collaboration to overcome the crisis. The world order became institutionalized -
The first great debate (1930s - 40s)
Ontological debate between liberalism and realism -
E. H. Carr: The Twenty Years' Crisis
Criticism of the liberals -
Re-establishment of the discipline
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Hans Morgenthau: Politics Among Nations
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The second great debate (1950s - 60s)
Epistemological debate between traditionalism and behaviouralism -
The third great debate (1960s - 70s)
Ontological debate between neo-liberalism and neo-realism (neo-Marxism) -
Birth of NGOs (1970s)
Societal actors became important and acted independently from governments -
The fourth great debate (1970s - 80s)
Epistemological debate between constructivism and rationalism