-
Relations among States
-
With the establishment of liberalism after the WW1 and realism after the WW2. Ontological debate (study of being).
-
Multilateral diplomacy appeard
-
Epistemological debate between behaviourism and traditionalism.
-
Profit and Non-Profit oriented NGOs started to exist
-
Ontological debate between neorealism, neoliberalism, and the new approach neo-marxism
-
With the end of the Cold war between constructivism and rationalism