Editing International relations (section)

====Power blocs====
The existence of power blocs in international relations is a significant factor related to [[Polarity (international relations)|polarity]]. During the [[Cold War]], the alignment of several nations to one side or another based on ideological differences or national interests has become an endemic feature of international relations. Unlike prior, shorter-term blocs, the [[Western Bloc| Western]] and [[Eastern Bloc]]s sought to spread their national ideological differences to other nations. Leaders like US President [[Harry S. Truman]] under the [[Truman Doctrine]] believed it was necessary to spread democracy whereas the [[Warsaw Pact]] under Soviet policy sought to spread [[communism]]. After the Cold War, and the dissolution of the ideologically homogeneous Eastern Bloc still gave rise to others such as the [[South-South Cooperation]] movement.{{sfnp|Mimiko|2012|pages= 15–16}}