Studies in the field of International Relations (IR) are taken into account by dividing the discipline into two or three schools. For example:

* “traditional theories, global society theories and neo-Marxist theories”

* “realism, pluralism and globalism”

*  “conservatism, liberalism and radicalism”.

* Machiavellianism, Grotianism and Kantianism

There are some other categorizations which are not mentioned above, such as realist approach, rationalist approach and revolutionary/ cosmopolitan approach.

As it is understood from the classifications and conceptualization, they all set forth the different aspects of the similar approaches. For example, the concepts of traditional classic theories, realism and conservatism are used to explain the basic arguments of the realist approach. Similarly, the theories of global society, pluralism and liberalism can be named under pluralism or liberalism. They can also be named under Kantianism, Grotianism communitarianism, cosmopolitanism and functionalism. The third group, which is classified with neo-Marxist theories, globalism and radicalism can be grouped with the concepts of Third World theories, Neo-Marxist theories, structuralist theories and dependency theories.

There is NO mention of post-modern approach among all these divisions.