Until the Second World War, Realism was the undisputed accepted theory of International Relations. However, with the emergence of international organizations after World War II, the diversity of actors in the system, the increasing interdependence, liberal theory has also become a focus of attention.
Marxist theory has a different approach to human nature than realism and liberalism. Marx wrote that history was the continuous transformation of human nature. Marxist theory perceives security as a function of the class struggle. International politics takes place within the context of capitalist economy. All behaviour ultimately explicable by reference to class interests/class conflicts. For this reason, key actors therefore not states, but classes. Marx also stated that history is the constant transformation of human nature. This approach draws a different way from the basic theory of international relations.
Keywords: International Relations Discipline, Marxism, Realism, Liberalism