theortical approaches to causes of iran- russia warm relations after the collaps of soviet :union:

iran has the longest political relations with russia among other great powers. this relation is resulted from neighborhood, trade, and cultural and racial factors between iran's people with some of the russia’s independent republics. purchasing of weapons by iran and participations of the soviet :union: in economic projects of iran helped the strengthening of the relations between the two countries in the period of the second pahlavi government. competition and threats are two concepts that explain relations between iran- russia in theses years. these relations changed from anxiety and threat to cooperation after iran islamic revolution. this paper examines tehran-moscow relations in context of realism, liberalism and constructivism theories. analytical method will be used for this purpose. findings of this paper show that among the theories constructivism can completely explain the causes of the warm relations between iran and russia after 1990s.